The life history of Loligo forbesi (Cephalopoda: Loliginidae) in Scottish waters

Pierce, Graham J.; Boyle, Peter Robin; Hastie, Lee C.; Key, L.N.

doi:10.1016/0165-7836(94)90094-9

Cited by 81 publications

(83 citation statements)

References 26 publications

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“…In the three studied sites, males had more percentages of empty stomachs than females. The present results agree with the results of many authors who recorded high percentage of empty stomachs in cephalopods (Pierce et al, 1994;Riad, 2000).…”

Section: Discussionsupporting

confidence: 83%

Feeding biology and biochemical composition of the lessepsian migrant Octopus aegina (Cephalopoda: Octopodidae)

Osman

Gabr

El-Etreby

et al. 2014

Egypt. J. of Aquatic Biolo. and Fish.

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The natural feeding of 609 Octopus aegina was studied in relation to the environmental seasonal variations in three populations in the Suez Canal, the Gulf of Suez and the Mediterranean Sea. Samples were collected seasonally from March 2009 till May 2010. Analysis of the stomach contents revealed that O. aegina attained the highest percentages of empty stomachs during spring for the three populations. The (1/2) full stomachs was dominant in the collected samples (32.97 %). The study revealed that 34.43 %, 32.83 % and 32.10 % of the examined stomachs were empty in the samples of Suez Canal, Gulf of Suez and Mediterranean, respectively. There was no definite seasonal food preference, and crustaceans were the most preferable food item followed by fishes. The biochemical composition of O. aegina revealed that females are higher than males in total protein content (72.41 % and 69.29 % for immature and mature females respectively) and total lipid content (38.4 g/100 g dry weight and 33.2 g/100 g dry weight for immature and mature females respectively). Amino acid analysis showed that O. aegina contains higher percentage of non essential amino acids (NEAA) than essential amino acids (EAA). Leucine, Lysine and Arginine had the highest percentage of EEA, while Asparagine, Glutamate and Glycine had the highest percentage of NEAA. EAA in males increased from 36.64% to 37.93 % in immature and mature respectively, while in females it increased from 36.93 % to 41.5 % in immature and mature respectively. Fatty acid analysis showed that males O. aegina contain higher percentage content of fatty acid components (SFA and UFA) than females. The results also revealed that SFA tended to decrease by maturation in males and females. Palmitic (16:0) and Stearic (18:0) were the most abundant SFA. Mature males had the highest percentage content of PUFA.

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Section: Discussionsupporting

confidence: 83%

Feeding biology and biochemical composition of the lessepsian migrant Octopus aegina (Cephalopoda: Octopodidae)

Osman

Gabr

El-Etreby

et al. 2014

Egypt. J. of Aquatic Biolo. and Fish.

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“…It is evident from the maturity of commercial samples and egg mass data in this study that spawning of L.firbe.si in the Irish and Celtic seas occurs primarily during the months November-April, with a peak in December, as in the English Channel (Hohne, 1974). Peak spawning of L. forbesi is slightly later in Scottish waters (Lum-Kong et al, 1992;Boyle and Ngoile, 1993a;Pierce et al, in press) and later again on the Faroe Bank (Gaard, 1987). There may be a trend of later peaks in spawning activity with increased latitude.…”

Section: Discussionmentioning

confidence: 99%

Recruitment, maturation, and spawning of Loligo forbesi Steenstrup (Cephalopoda: Loliginidae) in Irish waters

Collins

Burnell

Rodhouse

1995

ICES Journal of Marine Science

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Collins, M. A., Burnell, G. M., and Rodhouse, P. G. 1995. Recruitment, maturation, and spawning of Loligo ,forbesi Steen&up (Cephalopoda: Loliginidae) in Irish waters. -ICES J. mar. Sci., 52: 127-137.A number of reproductive indices were compared with a subjective maturity scale for assessment of Loligo forbesi maturity. The ratio between nidamental gland length and mantle length corresponded well with female maturation, as did the ovary mass-soma mass and nidamental gland mass-soma mass ratios. For males, the ratio between spermatophoric complex mass and somatic mass was found to be the most suitable for maturity assessment. The timing of recruitment and maturation of L. forbesi in Irish waters was described from the size and maturity of squid in commercial landings in the south of Ireland during the years 1991-1993. Immature squid first appeared in commercial catches in July and August, and this represented the main period of recruitment. A second period of recruitment was apparent in December 1991, but was not identified in the 1992-1993 season. Mature females were present in the commercially exploited population between November and April, with a small number also found in the summer. The abundance of egg masses was used to indicate timing of spawning. Egg masses recovered from the Cork coast indicated that peak spawning occurred during the winter months, but continued on a small scale for much of the year.

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“…Squids of the family Loliginidae display a semelparous, approximately annual life-history strategy, with oviparity, high individual fecundity, no parental care of offspring and non-overlapping generations (Boyle 1990, Boyle & Pierce 1994, Boyle & Boletzky 1996. High inter-annual variability in population sizes are also commonly observed (Boyle & Boletzky 1996).…”

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confidence: 99%

Multiple paternity within the brood of single females of Loligo forbesi (Cephalopoda:Loliginidae), demonstrated with microsatellite DNA markers

Shaw¹,

Boyle²

1997

Mar. Ecol. Prog. Ser.

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Microsatellite DNA markers developed for the squid Loligo forbesi were used to determine the genotype of a series of embryos obtained from egg stnngs of individual females. The results demonstrate that at least 2 males had been successful in fertilizing the eggs of a single female. The findings are compatible with observations of male competition at mating in other species of loliginid squid. They are discussed in relation to interpretation of specific questions of cephalopod ecology.

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The life history of Loligo forbesi (Cephalopoda: Loliginidae) in Scottish waters

Cited by 81 publications

References 26 publications

Feeding biology and biochemical composition of the lessepsian migrant Octopus aegina (Cephalopoda: Octopodidae)

Feeding biology and biochemical composition of the lessepsian migrant Octopus aegina (Cephalopoda: Octopodidae)

Recruitment, maturation, and spawning of Loligo forbesi Steenstrup (Cephalopoda: Loliginidae) in Irish waters

Multiple paternity within the brood of single females of Loligo forbesi (Cephalopoda:Loliginidae), demonstrated with microsatellite DNA markers

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