Statolith age validation and growth of Loligo plei (Cephalopoda: Loliginidae) in the north-west Gulf of Mexico during spring/summer

2002 ◽  
Vol 82 (4) ◽  
pp. 677-678 ◽  
Author(s):  
G.D. Jackson ◽  
J.W. Forsythe
Keyword(s):  
Gulf Of Mexico ◽  
Rapid Growth ◽  
Growth Analysis ◽  
Late Summer ◽  
Age And Growth ◽  
Age Validation ◽  
North West ◽  
The North ◽  
In Captivity ◽  
Loliginid Squid

Statolith validation and age and growth analysis was undertaken for the loliginid squid Loligo plei in the north-west Gulf of Mexico off Galveston, Texas. Statolith increments were shown to be laid down daily based on tetracycline staining of 19 individuals maintained in captivity. Ageing of field-captured individuals from late summer revealed that this species has rapid growth rates and a life span of about five months at least during the warm period of the year in this region of the Gulf of Mexico.

Age and growth of the scalloped hammerhead shark, Sphyrna lewini, in the north-west Atlantic Ocean and Gulf of Mexico

2007 ◽  
Vol 58 (1) ◽  
pp. 34 ◽  
Author(s):  
Andrew N. Piercy ◽  
John K. Carlson ◽  
James A. Sulikowski ◽  
George H. Burgess
Keyword(s):  
Atlantic Ocean ◽  
Gulf Of Mexico ◽  
Growth Parameters ◽  
Fork Length ◽  
Age And Growth ◽  
North West ◽  
Scalloped Hammerhead ◽  
The North ◽  
The Usa ◽  
Cent Error

The scalloped hammerhead, Sphryna lewini (Griffith & Smith, 1834), is a globally exploited species of shark. In order to gain insight into the life history of this species in the USA waters, age and growth was examined from specimens (n = 307) captured from the north-west Atlantic Ocean and from the Gulf of Mexico. The von Bertalanffy growth model resulted in growth parameters of L∞ = 214.8 cm fork length (FL), k = 0.13 year–1, t0 = –1.62 year for males and L∞ = 233.1 cm FL, k = 0.09 year–1, t0 = –2.22 year for females. The oldest age estimates obtained for this population were 30.5 years for both males and females, which corresponded to FL of 234 cm and 241 cm respectively. Bowker’s test of symmetry and Index of Average Per Cent Error suggests that our ageing method represents a non-biased and precise approach to the age assessment. Marginal increments were significantly different between months (Kruskal–Wallis P = 0.017) with a distinct trend of increasing monthly increment growth beginning in January. When compared to previously published studies, our growth estimates suggest slower growth than populations in the Pacific Ocean but faster growth than previously reported in the Gulf of Mexico.

Age and growth of the squid Todaropsis eblanae (Cephalopoda: Ommastrephidae) on the north-west African shelf

2000 ◽  
Vol 80 (4) ◽  
pp. 747-748 ◽  
Author(s):  
Alexander I. Arkhipkin ◽  
Vladimir V. Laptikhovsky
Keyword(s):  
High Growth ◽  
West African ◽  
Age And Growth ◽  
Length Frequency ◽  
Annual Life Cycle ◽  
Frequency Distributions ◽  
North West ◽  
The North ◽  
West African Coast ◽  
African Coast

Length composition, maturation and growth of the ommastrephid squid Todaropsis eblanae were studied using length–frequency distributions (LFDs) and statoliths of squid caught off the north-west African coast. Length–frequency distributions were quite similar in all seasons studied, indicating all year round spawning. However, both high proportions of mature squid in the winter and the hatching peak of squid from our sample in spring suggested the winter–spring peak of spawning. Immature and maturing squid had rather high growth rates, attaining 140—150 mm of dorsal mantle length (ML) by the age of 160—170 d. Todaropsis eblanae is likely to have an annual life cycle on the north-west African shelf.

scholarly journals An Indo-Pacific damselfish (Neopomacentrus cyanomos) in the Gulf of Mexico: origin and mode of introduction

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e4328 ◽  
Author(s):  
D. Ross Robertson ◽  
Omar Dominguez-Dominguez ◽  
Benjamin Victor ◽  
Nuno Simoes
Keyword(s):  
Gulf Of Mexico ◽  
Reef Fishes ◽  
Genetic Characteristics ◽  
West Pacific ◽  
North West ◽  
West Pacific Ocean ◽  
The North ◽  
The Usa ◽  
Tropical Reef ◽  
In Trans

The Indo-West Pacific (IWP) coral-reef damselfish Neopomacentrus cyanomos is well established across the south-west Gulf of Mexico (SwGoMx). Comparisons of mtDNA sequences of the SwGoMx population with those from conspecifics from 16 sites scattered across its native geographic range show that the SwGoMx population is derived from two of four native lineages: one from the north-west Pacific Ocean, the other from the northern Indian Ocean. Three hypotheses address how this species was introduced to the SwGoMX: (1) aquarium release; (2) borne by cargo-ship; and (3) carried by offshore petroleum platform (petro-platform). The first is unlikely because this species rarely features in the aquarium trade, and “N. cyanomos” traded to the USA from the sole IWP source we are aware of are a misidentified congener, N. taeniurus. The second hypothesis is unlikely because shipping has not been associated with the introduction of alien damselfishes, there is little international shipping between the IWP and the SwGoMx, and voyages between those areas would be lengthy and along environmentally unfavorable routes. Various lines of evidence support the third hypothesis: (i) bio-fouled petro-platforms represent artificial reefs that can sustain large and diverse populations of tropical reef-fishes, including N. cyanomos in the SwGoMx; (ii) relocation of such platforms has been implicated in trans-oceanic introductions leading to establishment of non-native populations of such fishes; and (iii) genetic characteristics of the SwGoMx population indicate that it was established by a large and diverse group of founders drawn from the IWP regions where many petro-platforms currently in the SwGoMx and other Atlantic offshore oilfields originated.

scholarly journals An Indo-Pacific damselfish in the Gulf of Mexico: origin and mode of introduction

2017 ◽  
Author(s):  
D Ross Robertson ◽  
Omar Dominguez-Dominguez ◽  
Benjamin Victor ◽  
Nuno Simoes
Keyword(s):  
Gulf Of Mexico ◽  
Reef Fishes ◽  
Genetic Characteristics ◽  
West Pacific ◽  
North West ◽  
West Pacific Ocean ◽  
The North ◽  
The Usa ◽  
Tropical Reef ◽  
In Trans

The Indo-west Pacific (IWP) coral-reef damselfish Neopomacentrus cyanomos is well established across the southwest Gulf of Mexico (SwGoMx). Comparisons of mtDNA sequences of the SwGoMx population with those from conspecifics from 16 sites scattered across its native range show that the SwGoMx population is derived from two of four native lineages: one from the north-west Pacific Ocean, the other from the northern Indian Ocean. Three hypotheses address how this species was introduced to the SwGoMX: (1) aquarium release; (2) borne by cargo-ship; and (3) carried by offshore petroleum platform (petro-platform). The first is unlikely because this species rarely features in the aquarium trade, and “N. cyanomos” traded to the USA from the sole IWP source we are aware of are a misidentified congener, N. taeniurus. The second hypothesis is unlikely because shipping has not been associated with the introduction of alien damselfishes, there is little international shipping between the IWP and the SwGoMx, and voyages between those areas would be lengthy and along environmentally unfavorable routes. Various lines of evidence support the third hypothesis: (i) bio-fouled petro-platforms represent artificial reefs that can sustain large and diverse populations of tropical reef-fishes, including N. cyanomos in the SwGoMx; (ii) relocation of such platforms has been implicated in trans-ocean introductions leading to establishment of non-native populations of such fishes; and (iii) genetic characteristics of the SwGoMx population indicate that it was established by a large and diverse group of founders drawn from the regions where many SwGoMx petro-platforms originated.

Age and Growth of Red Drum Larvae in the North-Central Gulf of Mexico

1989 ◽  
Vol 118 (2) ◽  
pp. 159-167 ◽  
Author(s):  
Bruce H. Comyns ◽  
Joanne Lyczkowski-Shultz ◽  
Chester F. Rakocinski ◽  
John P. Steen
Keyword(s):  
Gulf Of Mexico ◽  
Red Drum ◽  
Age And Growth ◽  
North Central ◽  
The North

Diel variation of the zooplankton and its environment at neritic stations in the Inland Sea of Japan and the north-west Gulf of Mexico

1992 ◽  
Vol 14 (1) ◽  
pp. 1-40 ◽  
Author(s):  
D.M. Checkley ◽  
S. Uye ◽  
M.J. Dagg ◽  
M.M. Mullin ◽  
M. Omori ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Sea Of Japan ◽  
Diel Variation ◽  
North West ◽  
The North ◽  
Inland Sea Of Japan

scholarly journals An Indo-Pacific damselfish in the Gulf of Mexico: origin and mode of introduction

2017 ◽  
Author(s):  
D Ross Robertson ◽  
Omar Dominguez-Dominguez ◽  
Benjamin Victor ◽  
Nuno Simoes
Keyword(s):  
Gulf Of Mexico ◽  
Reef Fishes ◽  
Genetic Characteristics ◽  
West Pacific ◽  
North West ◽  
West Pacific Ocean ◽  
The North ◽  
The Usa ◽  
Tropical Reef ◽  
In Trans

The Indo-west Pacific (IWP) coral-reef damselfish Neopomacentrus cyanomos is well established across the southwest Gulf of Mexico (SwGoMx). Comparisons of mtDNA sequences of the SwGoMx population with those from conspecifics from 16 sites scattered across its native range show that the SwGoMx population is derived from two of four native lineages: one from the north-west Pacific Ocean, the other from the northern Indian Ocean. Three hypotheses address how this species was introduced to the SwGoMX: (1) aquarium release; (2) borne by cargo-ship; and (3) carried by offshore petroleum platform (petro-platform). The first is unlikely because this species rarely features in the aquarium trade, and “N. cyanomos” traded to the USA from the sole IWP source we are aware of are a misidentified congener, N. taeniurus. The second hypothesis is unlikely because shipping has not been associated with the introduction of alien damselfishes, there is little international shipping between the IWP and the SwGoMx, and voyages between those areas would be lengthy and along environmentally unfavorable routes. Various lines of evidence support the third hypothesis: (i) bio-fouled petro-platforms represent artificial reefs that can sustain large and diverse populations of tropical reef-fishes, including N. cyanomos in the SwGoMx; (ii) relocation of such platforms has been implicated in trans-ocean introductions leading to establishment of non-native populations of such fishes; and (iii) genetic characteristics of the SwGoMx population indicate that it was established by a large and diverse group of founders drawn from the regions where many SwGoMx petro-platforms originated.

Geographical variation in growth and maturation of the squid illex coindeth (Oegopsida, Ommastrephidae) off the north-west African coast

1996 ◽  
Vol 76 (4) ◽  
pp. 1091-1106 ◽  
Author(s):  
Alexander Arkhipkin
Keyword(s):  
Life Span ◽  
Sierra Leone ◽  
Growth Rates ◽  
West African ◽  
Age And Growth ◽  
Geographical Differences ◽  
Western Sahara ◽  
North West ◽  
The North ◽  
Growth Increments

Statolith microstructure was studied in 162 specimens of Illex coindetii (mantle length ranging from 48 to 300 mm) captured on the shelves of Sierra Leone and Western Sahara between May and November 1987. Growth increments were revealed in all statoliths studied, but they were not well-resolved as in other congeneric species Illex illecebrosus and Illex argentinus. Age and growth rates were estimated assuming that growth increments within statoliths were produced. In both regions, differences in growth rates between sexes (females become larger than males) occurred first in length and then in weight. Geographical differences in sex-specific growth (Western Sahara squid grow faster and attain larger sizes than Sierra Leone squid) was apparent after 150 d in females and 120 d in males. Illex coindetii in Sierra Leone started maturing at smaller sizes but at approximately the same age as the Western Sahara squid. Small sized early maturing groups of I. coindetii with a life span of ~0.5 y occurred in both regions. However, large sized late maturing squid with a life span of ~1 y were encountered only in the Western Sahara. In waters of the west African shelf, I. coindetii spawn throughout the year.

scholarly journals Laser ablation–accelerator mass spectrometry reveals complete bomb 14C signal in an otolith with confirmation of 60-year longevity for red snapper (Lutjanus campechanus)

2019 ◽  
Vol 70 (12) ◽  
pp. 1768 ◽  
Author(s):  
Allen H. Andrews ◽  
Christiane Yeman ◽  
Caroline Welte ◽  
Bodo Hattendorf ◽  
Lukas Wacker ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Laser Ablation ◽  
Gulf Of Mexico ◽  
Accelerator Mass Spectrometry ◽  
Red Snapper ◽  
Age And Growth ◽  
Lutjanus Campechanus ◽  
Age Validation ◽  
14C Dating ◽  
Marine Surface Layer

Bomb-produced 14C has been used to make valid estimates of age for various marine organisms for 25 years, but fish ages that lead to birth years earlier than the period of increase in 14C lose their time specificity. As a result, bomb 14C dating is limited to a minimum age from the last year of prebomb levels because the temporal variation in 14C in the marine surface layer is negligible for decades before c. 1958. The longevity of red snapper (Lutjanus campechanus) in the Gulf of Mexico remains unresolved despite various forms of support for ages near 50–60 years. Although the age and growth of red snapper have been verified or validated to a limited extent, some scepticism remains about longevity estimates that exceed 30 years. In this study, red snapper otoliths were analysed for 14C using a novel laser ablation–accelerator mass spectrometry technique to provide a continuous record of 14C uptake. This approach provided a basis for age validation that extends beyond the normal limits of bomb 14C dating with confirmation of a 60-year longevity for red snapper in the Gulf of Mexico.

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