Timing of spawning and recruitment in Loligo forbesi (Cephalopoda: Loliginidae) in Scottish waters
- 11 May 1992
- journal article
- research article
- Published by Cambridge University Press (CUP) in Journal of the Marine Biological Association of the United Kingdom
- Vol. 72 (2) , 301-311
- https://doi.org/10.1017/s0025315400037711
Abstract
The timing of spawning and recruitment in the squid Loligo forbesi in Scottish waters is described on the basis of data from three sources: monthly samples of squid caught by commercial trawls (1986–1988), egg masses found by fishermen (1987–1991), and statistical data on animals caught by research trawls (1978–1987).Spawning females were present in samples from December to June, with peak spawning occurring in March. Most records of egg masses were from these months, but eggs were also found in August and September. These results suggest that there is an extended spawning season.Small squid (≤100 mm dorsal mantle length) were rarely present in commercial samples, but were recorded in research samples almost all year round. Thus there appears to be more or less continuous recruitment into the catchable population.The results of the present study are consistent with published data from other parts of the geographic range in that there is a regular seasonal peak in spawning, and spawning adults disappear from the population in summer. Further interpretation of the life-cycle of this species is not justified on the basis of current knowledge, and more information is needed on migrations, geographical variation, and lifespan in Loligo forbesi.Keywords
This publication has 10 references indexed in Scilit:
- Demography and distribution of the Patagonian squid (Loligo gahi d'Orbigny) during the austral winterICES Journal of Marine Science, 1990
- Evidence for multiple spawning in the tropical oceanic squid Stenoteuthis oualaniensis (Teuthoidea: Ommastrephidae)Marine Biology, 1989
- Growth of the Eastern Atlantic squid, Loligo forbesi Steenstrup (Mollusca: Cephalopoda)Aquaculture Research, 1989
- Laboratory culture and estimated life span of the Eastern Atlantic squid, Loligo forbesi Steenstrup, 1856 (Mollusca: Cephalopoda)Aquaculture Research, 1989
- Life history of Patagonian squid Loligo gahi and growth parameter estimates using least-squares fits to linear and von Bertalanffy modelsMarine Ecology Progress Series, 1988
- Life cycle, demography and reproductive investment in the myopsid squid Alloteuthis subulataMarine Ecology Progress Series, 1988
- Biological Studies of the Exploited Stock ofLoligo Forbesi (Mollusca: Cephalopoda) in the AzoresJournal of the Marine Biological Association of the United Kingdom, 1982
- The Biology ofLoligo ForbesiSteenstrup (Mollusca: Cephalopoda) in the Plymouth AreaJournal of the Marine Biological Association of the United Kingdom, 1974
- AGE AND GROWTH OFLOLIGO PEALEI,A POPULATION STUDY OF THE COMMON ATLANTIC COAST SQUIDThe Biological Bulletin, 1971
- THE GROWTH AND SIZE DISTRIBUTION OF CURRENT YEAR CLASS LOLIGO PEALEIThe Biological Bulletin, 1968