Ontogenetic shifts in trophic geography of jumbo squid,

Incrementally-formed, metabolically-inert tissues have been used extensively to study marine animal trophic habitat retrospectively throughout their lifetime. In this study, sequential stable isotopic values of δ13C and δ15N in eye lenses were measured to investigate ontogenetic shifts in the trophi...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Liu, Bi Lin [verfasserIn] Xu, Wei [verfasserIn] Chen, Xin Jun [verfasserIn] Huan, Meng Yao [verfasserIn] Liu, Na [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2020

Schlagwörter:	Stable isotope Eye lenses Trophic ecology Spatial ecology

Übergeordnetes Werk:	Enthalten in: Fisheries research - Amsterdam [u.a.] : Elsevier Science, 1981, 226
Übergeordnetes Werk:	volume:226

DOI / URN:	10.1016/j.fishres.2020.105507

Katalog-ID:	ELV003877647

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520			\|a Incrementally-formed, metabolically-inert tissues have been used extensively to study marine animal trophic habitat retrospectively throughout their lifetime. In this study, sequential stable isotopic values of δ13C and δ15N in eye lenses were measured to investigate ontogenetic shifts in the trophic geography of Dosidicus gigas. A total of 617 segments from 73 lenses were examined with δ13C ranging from −20.45 to −15.47‰ and δ15N ranging from 4.34 to 18.74‰. A Generalized Additive Models (GAMs) result showed significantly increased isotopes across the eye lens which significantly differed between years and sexes. Sequential increasing but a variation in δ13C and δ15N values in eye lenses suggests that D. gigas opportunistically feeds on available prey but as it grows, it becomes progressively able to consume prey from higher trophic levels, perhaps to maximize feeding success. Analysis of variance (ANOVA) showed squid to have significant ontogenetic differences in δ13C but not in δ15N at different growth stages. These ontogenetic isotopic changes cannot be explained solely by trophic growth and may also be due to geographic movement. The corrected standard ellipse area (SEAc) of the embryonic, paralarval, juvenile, adult and dying phases were 10.802‰, 11.552‰, 9.152‰, 4.512‰ and 4.372‰, which suggests squid in early life span live in wide areas with different isotopic baseline values, but adult squid forage in the same habitat and become more specialized on particular prey. There were high and medium isotopic overlaps between the two consecutive stages for before juvenile and after juvenile, respectively, which reflect the squid nursery and foraging strategy. The lack of isotopic overlap between embryo and adult squid suggests that maternal squid have different trophic and spatial ecology compared with their offspring.
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matchkey_str	article:01657836:2020----::noeeisititohcega
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publishDate	2020
allfields	10.1016/j.fishres.2020.105507 doi (DE-627)ELV003877647 (ELSEVIER)S0165-7836(20)30024-2 DE-627 ger DE-627 rda eng 630 640 DE-600 Liu, Bi Lin verfasserin aut Ontogenetic shifts in trophic geography of jumbo squid, 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Incrementally-formed, metabolically-inert tissues have been used extensively to study marine animal trophic habitat retrospectively throughout their lifetime. In this study, sequential stable isotopic values of δ13C and δ15N in eye lenses were measured to investigate ontogenetic shifts in the trophic geography of Dosidicus gigas. A total of 617 segments from 73 lenses were examined with δ13C ranging from −20.45 to −15.47‰ and δ15N ranging from 4.34 to 18.74‰. A Generalized Additive Models (GAMs) result showed significantly increased isotopes across the eye lens which significantly differed between years and sexes. Sequential increasing but a variation in δ13C and δ15N values in eye lenses suggests that D. gigas opportunistically feeds on available prey but as it grows, it becomes progressively able to consume prey from higher trophic levels, perhaps to maximize feeding success. Analysis of variance (ANOVA) showed squid to have significant ontogenetic differences in δ13C but not in δ15N at different growth stages. These ontogenetic isotopic changes cannot be explained solely by trophic growth and may also be due to geographic movement. The corrected standard ellipse area (SEAc) of the embryonic, paralarval, juvenile, adult and dying phases were 10.802‰, 11.552‰, 9.152‰, 4.512‰ and 4.372‰, which suggests squid in early life span live in wide areas with different isotopic baseline values, but adult squid forage in the same habitat and become more specialized on particular prey. There were high and medium isotopic overlaps between the two consecutive stages for before juvenile and after juvenile, respectively, which reflect the squid nursery and foraging strategy. The lack of isotopic overlap between embryo and adult squid suggests that maternal squid have different trophic and spatial ecology compared with their offspring. Stable isotope Eye lenses Trophic ecology Spatial ecology Xu, Wei verfasserin aut Chen, Xin Jun verfasserin aut Huan, Meng Yao verfasserin aut Liu, Na verfasserin aut Enthalten in Fisheries research Amsterdam [u.a.] : Elsevier Science, 1981 226 Online-Ressource (DE-627)306583534 (DE-600)1497860-X (DE-576)259270946 0165-7836 nnns volume:226 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 AR 226
spelling	10.1016/j.fishres.2020.105507 doi (DE-627)ELV003877647 (ELSEVIER)S0165-7836(20)30024-2 DE-627 ger DE-627 rda eng 630 640 DE-600 Liu, Bi Lin verfasserin aut Ontogenetic shifts in trophic geography of jumbo squid, 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Incrementally-formed, metabolically-inert tissues have been used extensively to study marine animal trophic habitat retrospectively throughout their lifetime. In this study, sequential stable isotopic values of δ13C and δ15N in eye lenses were measured to investigate ontogenetic shifts in the trophic geography of Dosidicus gigas. A total of 617 segments from 73 lenses were examined with δ13C ranging from −20.45 to −15.47‰ and δ15N ranging from 4.34 to 18.74‰. A Generalized Additive Models (GAMs) result showed significantly increased isotopes across the eye lens which significantly differed between years and sexes. Sequential increasing but a variation in δ13C and δ15N values in eye lenses suggests that D. gigas opportunistically feeds on available prey but as it grows, it becomes progressively able to consume prey from higher trophic levels, perhaps to maximize feeding success. Analysis of variance (ANOVA) showed squid to have significant ontogenetic differences in δ13C but not in δ15N at different growth stages. These ontogenetic isotopic changes cannot be explained solely by trophic growth and may also be due to geographic movement. The corrected standard ellipse area (SEAc) of the embryonic, paralarval, juvenile, adult and dying phases were 10.802‰, 11.552‰, 9.152‰, 4.512‰ and 4.372‰, which suggests squid in early life span live in wide areas with different isotopic baseline values, but adult squid forage in the same habitat and become more specialized on particular prey. There were high and medium isotopic overlaps between the two consecutive stages for before juvenile and after juvenile, respectively, which reflect the squid nursery and foraging strategy. The lack of isotopic overlap between embryo and adult squid suggests that maternal squid have different trophic and spatial ecology compared with their offspring. Stable isotope Eye lenses Trophic ecology Spatial ecology Xu, Wei verfasserin aut Chen, Xin Jun verfasserin aut Huan, Meng Yao verfasserin aut Liu, Na verfasserin aut Enthalten in Fisheries research Amsterdam [u.a.] : Elsevier Science, 1981 226 Online-Ressource (DE-627)306583534 (DE-600)1497860-X (DE-576)259270946 0165-7836 nnns volume:226 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 AR 226
allfields_unstemmed	10.1016/j.fishres.2020.105507 doi (DE-627)ELV003877647 (ELSEVIER)S0165-7836(20)30024-2 DE-627 ger DE-627 rda eng 630 640 DE-600 Liu, Bi Lin verfasserin aut Ontogenetic shifts in trophic geography of jumbo squid, 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Incrementally-formed, metabolically-inert tissues have been used extensively to study marine animal trophic habitat retrospectively throughout their lifetime. In this study, sequential stable isotopic values of δ13C and δ15N in eye lenses were measured to investigate ontogenetic shifts in the trophic geography of Dosidicus gigas. A total of 617 segments from 73 lenses were examined with δ13C ranging from −20.45 to −15.47‰ and δ15N ranging from 4.34 to 18.74‰. A Generalized Additive Models (GAMs) result showed significantly increased isotopes across the eye lens which significantly differed between years and sexes. Sequential increasing but a variation in δ13C and δ15N values in eye lenses suggests that D. gigas opportunistically feeds on available prey but as it grows, it becomes progressively able to consume prey from higher trophic levels, perhaps to maximize feeding success. Analysis of variance (ANOVA) showed squid to have significant ontogenetic differences in δ13C but not in δ15N at different growth stages. These ontogenetic isotopic changes cannot be explained solely by trophic growth and may also be due to geographic movement. The corrected standard ellipse area (SEAc) of the embryonic, paralarval, juvenile, adult and dying phases were 10.802‰, 11.552‰, 9.152‰, 4.512‰ and 4.372‰, which suggests squid in early life span live in wide areas with different isotopic baseline values, but adult squid forage in the same habitat and become more specialized on particular prey. There were high and medium isotopic overlaps between the two consecutive stages for before juvenile and after juvenile, respectively, which reflect the squid nursery and foraging strategy. The lack of isotopic overlap between embryo and adult squid suggests that maternal squid have different trophic and spatial ecology compared with their offspring. Stable isotope Eye lenses Trophic ecology Spatial ecology Xu, Wei verfasserin aut Chen, Xin Jun verfasserin aut Huan, Meng Yao verfasserin aut Liu, Na verfasserin aut Enthalten in Fisheries research Amsterdam [u.a.] : Elsevier Science, 1981 226 Online-Ressource (DE-627)306583534 (DE-600)1497860-X (DE-576)259270946 0165-7836 nnns volume:226 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 AR 226
allfieldsGer	10.1016/j.fishres.2020.105507 doi (DE-627)ELV003877647 (ELSEVIER)S0165-7836(20)30024-2 DE-627 ger DE-627 rda eng 630 640 DE-600 Liu, Bi Lin verfasserin aut Ontogenetic shifts in trophic geography of jumbo squid, 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Incrementally-formed, metabolically-inert tissues have been used extensively to study marine animal trophic habitat retrospectively throughout their lifetime. In this study, sequential stable isotopic values of δ13C and δ15N in eye lenses were measured to investigate ontogenetic shifts in the trophic geography of Dosidicus gigas. A total of 617 segments from 73 lenses were examined with δ13C ranging from −20.45 to −15.47‰ and δ15N ranging from 4.34 to 18.74‰. A Generalized Additive Models (GAMs) result showed significantly increased isotopes across the eye lens which significantly differed between years and sexes. Sequential increasing but a variation in δ13C and δ15N values in eye lenses suggests that D. gigas opportunistically feeds on available prey but as it grows, it becomes progressively able to consume prey from higher trophic levels, perhaps to maximize feeding success. Analysis of variance (ANOVA) showed squid to have significant ontogenetic differences in δ13C but not in δ15N at different growth stages. These ontogenetic isotopic changes cannot be explained solely by trophic growth and may also be due to geographic movement. The corrected standard ellipse area (SEAc) of the embryonic, paralarval, juvenile, adult and dying phases were 10.802‰, 11.552‰, 9.152‰, 4.512‰ and 4.372‰, which suggests squid in early life span live in wide areas with different isotopic baseline values, but adult squid forage in the same habitat and become more specialized on particular prey. There were high and medium isotopic overlaps between the two consecutive stages for before juvenile and after juvenile, respectively, which reflect the squid nursery and foraging strategy. The lack of isotopic overlap between embryo and adult squid suggests that maternal squid have different trophic and spatial ecology compared with their offspring. Stable isotope Eye lenses Trophic ecology Spatial ecology Xu, Wei verfasserin aut Chen, Xin Jun verfasserin aut Huan, Meng Yao verfasserin aut Liu, Na verfasserin aut Enthalten in Fisheries research Amsterdam [u.a.] : Elsevier Science, 1981 226 Online-Ressource (DE-627)306583534 (DE-600)1497860-X (DE-576)259270946 0165-7836 nnns volume:226 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 AR 226
allfieldsSound	10.1016/j.fishres.2020.105507 doi (DE-627)ELV003877647 (ELSEVIER)S0165-7836(20)30024-2 DE-627 ger DE-627 rda eng 630 640 DE-600 Liu, Bi Lin verfasserin aut Ontogenetic shifts in trophic geography of jumbo squid, 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Incrementally-formed, metabolically-inert tissues have been used extensively to study marine animal trophic habitat retrospectively throughout their lifetime. In this study, sequential stable isotopic values of δ13C and δ15N in eye lenses were measured to investigate ontogenetic shifts in the trophic geography of Dosidicus gigas. A total of 617 segments from 73 lenses were examined with δ13C ranging from −20.45 to −15.47‰ and δ15N ranging from 4.34 to 18.74‰. A Generalized Additive Models (GAMs) result showed significantly increased isotopes across the eye lens which significantly differed between years and sexes. Sequential increasing but a variation in δ13C and δ15N values in eye lenses suggests that D. gigas opportunistically feeds on available prey but as it grows, it becomes progressively able to consume prey from higher trophic levels, perhaps to maximize feeding success. Analysis of variance (ANOVA) showed squid to have significant ontogenetic differences in δ13C but not in δ15N at different growth stages. These ontogenetic isotopic changes cannot be explained solely by trophic growth and may also be due to geographic movement. The corrected standard ellipse area (SEAc) of the embryonic, paralarval, juvenile, adult and dying phases were 10.802‰, 11.552‰, 9.152‰, 4.512‰ and 4.372‰, which suggests squid in early life span live in wide areas with different isotopic baseline values, but adult squid forage in the same habitat and become more specialized on particular prey. There were high and medium isotopic overlaps between the two consecutive stages for before juvenile and after juvenile, respectively, which reflect the squid nursery and foraging strategy. The lack of isotopic overlap between embryo and adult squid suggests that maternal squid have different trophic and spatial ecology compared with their offspring. Stable isotope Eye lenses Trophic ecology Spatial ecology Xu, Wei verfasserin aut Chen, Xin Jun verfasserin aut Huan, Meng Yao verfasserin aut Liu, Na verfasserin aut Enthalten in Fisheries research Amsterdam [u.a.] : Elsevier Science, 1981 226 Online-Ressource (DE-627)306583534 (DE-600)1497860-X (DE-576)259270946 0165-7836 nnns volume:226 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 AR 226
language	English
source	Enthalten in Fisheries research 226 volume:226
sourceStr	Enthalten in Fisheries research 226 volume:226
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	Stable isotope Eye lenses Trophic ecology Spatial ecology
dewey-raw	630
isfreeaccess_bool	false
container_title	Fisheries research
authorswithroles_txt_mv	Liu, Bi Lin @@aut@@ Xu, Wei @@aut@@ Chen, Xin Jun @@aut@@ Huan, Meng Yao @@aut@@ Liu, Na @@aut@@
publishDateDaySort_date	2020-01-01T00:00:00Z
hierarchy_top_id	306583534
dewey-sort	3630
id	ELV003877647
language_de	englisch
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author	Liu, Bi Lin
spellingShingle	Liu, Bi Lin ddc 630 misc Stable isotope misc Eye lenses misc Trophic ecology misc Spatial ecology Ontogenetic shifts in trophic geography of jumbo squid,
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topic_title	630 640 DE-600 Ontogenetic shifts in trophic geography of jumbo squid Stable isotope Eye lenses Trophic ecology Spatial ecology
topic	ddc 630 misc Stable isotope misc Eye lenses misc Trophic ecology misc Spatial ecology
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title	Ontogenetic shifts in trophic geography of jumbo squid,
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title_full	Ontogenetic shifts in trophic geography of jumbo squid
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title_sort	ontogenetic shifts in trophic geography of jumbo squid
title_auth	Ontogenetic shifts in trophic geography of jumbo squid,
abstract	Incrementally-formed, metabolically-inert tissues have been used extensively to study marine animal trophic habitat retrospectively throughout their lifetime. In this study, sequential stable isotopic values of δ13C and δ15N in eye lenses were measured to investigate ontogenetic shifts in the trophic geography of Dosidicus gigas. A total of 617 segments from 73 lenses were examined with δ13C ranging from −20.45 to −15.47‰ and δ15N ranging from 4.34 to 18.74‰. A Generalized Additive Models (GAMs) result showed significantly increased isotopes across the eye lens which significantly differed between years and sexes. Sequential increasing but a variation in δ13C and δ15N values in eye lenses suggests that D. gigas opportunistically feeds on available prey but as it grows, it becomes progressively able to consume prey from higher trophic levels, perhaps to maximize feeding success. Analysis of variance (ANOVA) showed squid to have significant ontogenetic differences in δ13C but not in δ15N at different growth stages. These ontogenetic isotopic changes cannot be explained solely by trophic growth and may also be due to geographic movement. The corrected standard ellipse area (SEAc) of the embryonic, paralarval, juvenile, adult and dying phases were 10.802‰, 11.552‰, 9.152‰, 4.512‰ and 4.372‰, which suggests squid in early life span live in wide areas with different isotopic baseline values, but adult squid forage in the same habitat and become more specialized on particular prey. There were high and medium isotopic overlaps between the two consecutive stages for before juvenile and after juvenile, respectively, which reflect the squid nursery and foraging strategy. The lack of isotopic overlap between embryo and adult squid suggests that maternal squid have different trophic and spatial ecology compared with their offspring.
abstractGer	Incrementally-formed, metabolically-inert tissues have been used extensively to study marine animal trophic habitat retrospectively throughout their lifetime. In this study, sequential stable isotopic values of δ13C and δ15N in eye lenses were measured to investigate ontogenetic shifts in the trophic geography of Dosidicus gigas. A total of 617 segments from 73 lenses were examined with δ13C ranging from −20.45 to −15.47‰ and δ15N ranging from 4.34 to 18.74‰. A Generalized Additive Models (GAMs) result showed significantly increased isotopes across the eye lens which significantly differed between years and sexes. Sequential increasing but a variation in δ13C and δ15N values in eye lenses suggests that D. gigas opportunistically feeds on available prey but as it grows, it becomes progressively able to consume prey from higher trophic levels, perhaps to maximize feeding success. Analysis of variance (ANOVA) showed squid to have significant ontogenetic differences in δ13C but not in δ15N at different growth stages. These ontogenetic isotopic changes cannot be explained solely by trophic growth and may also be due to geographic movement. The corrected standard ellipse area (SEAc) of the embryonic, paralarval, juvenile, adult and dying phases were 10.802‰, 11.552‰, 9.152‰, 4.512‰ and 4.372‰, which suggests squid in early life span live in wide areas with different isotopic baseline values, but adult squid forage in the same habitat and become more specialized on particular prey. There were high and medium isotopic overlaps between the two consecutive stages for before juvenile and after juvenile, respectively, which reflect the squid nursery and foraging strategy. The lack of isotopic overlap between embryo and adult squid suggests that maternal squid have different trophic and spatial ecology compared with their offspring.
abstract_unstemmed	Incrementally-formed, metabolically-inert tissues have been used extensively to study marine animal trophic habitat retrospectively throughout their lifetime. In this study, sequential stable isotopic values of δ13C and δ15N in eye lenses were measured to investigate ontogenetic shifts in the trophic geography of Dosidicus gigas. A total of 617 segments from 73 lenses were examined with δ13C ranging from −20.45 to −15.47‰ and δ15N ranging from 4.34 to 18.74‰. A Generalized Additive Models (GAMs) result showed significantly increased isotopes across the eye lens which significantly differed between years and sexes. Sequential increasing but a variation in δ13C and δ15N values in eye lenses suggests that D. gigas opportunistically feeds on available prey but as it grows, it becomes progressively able to consume prey from higher trophic levels, perhaps to maximize feeding success. Analysis of variance (ANOVA) showed squid to have significant ontogenetic differences in δ13C but not in δ15N at different growth stages. These ontogenetic isotopic changes cannot be explained solely by trophic growth and may also be due to geographic movement. The corrected standard ellipse area (SEAc) of the embryonic, paralarval, juvenile, adult and dying phases were 10.802‰, 11.552‰, 9.152‰, 4.512‰ and 4.372‰, which suggests squid in early life span live in wide areas with different isotopic baseline values, but adult squid forage in the same habitat and become more specialized on particular prey. There were high and medium isotopic overlaps between the two consecutive stages for before juvenile and after juvenile, respectively, which reflect the squid nursery and foraging strategy. The lack of isotopic overlap between embryo and adult squid suggests that maternal squid have different trophic and spatial ecology compared with their offspring.
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title_short	Ontogenetic shifts in trophic geography of jumbo squid,
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author2	Xu, Wei Chen, Xin Jun Huan, Meng Yao Liu, Na
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doi_str	10.1016/j.fishres.2020.105507
up_date	2024-07-06T21:05:43.853Z
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