+ Translate
+ Most Popular
The pigeon tick (Argas reflexus): its biology, ecology, and epidemiological aspects
Prevalence of hemoglobin abnormalities in Kebili (Tunisian South)
Lipogranuloma: a preventable complication of dacryocystorhinostomy
Value of basal plasma cortisol assays in the assessment of pituitary-adrenal insufficiency
Bees from the Belgian Congo. The acraensis group of Anthophora
Placing gingival retraction cord
Total serum IgE, allergy skin testing, and the radioallergosorbent test for the diagnosis of allergy in asthmatic children
Acariens plumicoles Analgesoidea parasites des oiseaux du Maroc
Injuries of terminal phalanges of the fingers in children
Biology of flowering and nectar production in pear (Pyrus communis)
Das Reliktvorkommen der Aspisviper (Vipera aspis L.) im Schwarzwald
Hydrological modelling of drained blanket peatland
Pathologic morphology and clinical significance of the anomalous origin of the left circumflex coronary artery from the right coronary artery. General review and autopsy analysis of 30 cases
Cyto genetic analyses of lymphocyte cultures after exposure to calcium cyclamate
Axelrodia riesei, a new characoid fish from Upper Rio Meta in Colombia With remarks concerning the genus Axelrodia and description of a similar, sympatric, Hyphessobrycon-species
Favorable evolution of a case of tuberculosis of pancreas under antibiotic action
RIFM fragrance ingredient safety assessment, Valencene, CAS Registry Number 4630-07-3
Parenteral microemulsions: an overview
Temperate pasture: management for grazing and conservation
Evaluation of a new coprocessed compound based on lactose and maize starch for tablet formulation
Thermal expansion and cracking of three confined water-saturated igneous rocks to 800C
Revision of the genera of the tribe Stigmoderini (Coleoptera: Buprestidae) a discussion of phylogenetic relationships
Anal tuberculosis. Report of a case
Gastric tuberculosis in the past and present
Adaptive responses of the cardiovascular system to prolonged spaceflight conditions: assessment with Holter monitoring

Seasonal variation in reproductive investment in the tropical loliginid squid Loligo chinensis and the small tropical sepioid Idiosepius pygmaeus

Seasonal variation in reproductive investment in the tropical loliginid squid Loligo chinensis and the small tropical sepioid Idiosepius pygmaeus

U S National Marine Fisheries Service Fishery Bulletin 91(2): 260-270

Seasonal variability in gonad growth was investigated for the tropical cephalopods Loligo chinensis and Idiosepius pygmaeus. Statolith ageing techniques enabled a comparison of gonad growth in relation to both individual size and age. Age analyses revealed that male and female individuals of L. chinensis matured earlier during the warmer summer period than in the cooler winter period. These preliminary results suggested that maturity was governed more by individual size rather than age. Analysis of seasonal change in the gonadosomatic index (GSI) revealed that L. chinensis gonad tissue accounted for the greatest percentage of body weight in the month of October. The trend in the nidamental gland/mantle length index closely paralleled the trend in GSI values for female individuals of L. chinensis, while growth of the nidamental gland and hectocotylus closely paralleled growth of the gonad. The seasonal variation in reproductive investment for Idiosepius pygmaeus followed a different pattern compared with L. chinensis. Slower growing cool-season (spring) individuals lived longer and had comparatively larger gonads than their warm-season (autumn) counterparts, despite no difference in body size between the two seasons. Idiosepius pygmaeus thus appeared to be employing a 'trade-off' in its reproductive strategy by partitioning a greater amount of energy into gonad tissue over a longer lifespan during the cooler period of the year.

Please choose payment method:

(PDF emailed within 1 workday: $29.90)

Accession: 009385582

Download citation: RISBibTeXText

Related references

Seasonal abundance of the small tropical sepioid Idiosepius pygmaeus at two localities off Townsville, North Queensland, Australia. Veliger 35(4): 396-401, 1992

Seasonal influences on statolith growth in the tropical nearshore loliginid squid Loligo chinensis (Cephalopoda: Loliginidae) off Townsville, North Queensland, Australia. Fishery Bulletin 93: 9-52, 1995

Effect of feeding on the structure of the digestive gland of the tropical sepioid Idiosepius pygmaeus. Journal of the Marine Biological Association of the United Kingdom 75(4): 885-897, 1995

Patterns of investment in reproductive and somatic tissues in the loliginid squid Loligo forbesii and Loligo vulgaris in Iberian and Azorean waters. Hydrobiologia 670(1): 201-221, 2011

Projected near-future CO2 levels increase activity and alter defensive behaviours in the tropical squid Idiosepius pygmaeus. Biology Open 3(11): 1063-1070, 2014

Spawning mode and reproductive output of the tropical cephalopod Idiosepius pygmaeus. Canadian Journal of Fisheries and Aquatic Sciences 50(1): 20-28, 1993

The use of tetracycline staining techniques to determine statolith growth ring periodicity in the tropical loliginid squids loliolus noctiluca and loligo chinensis. Veliger 33(4): 389-393, 1990

Changes in muscle structure associated with somatic growth in Idiosepius pygmaeus, a small tropical cephalopod. Journal Of Zoology (london). 242(4): 751-764, 1997

The use of statolith microstructures to analyze life history events in the small tropical cephalopod idiosepius pygmaeus. Fishery Bulletin (Washington D C) 87(2): 265-272, 1989

Seasonal patterns of investment in reproductive and somatic tissues in the squid Loligo forbesi. 2004 Ices Annual Science Conference 18(4): 341-351, 2005

Seasonal patterns of investment in reproductive and somatic tissues in the squid Loligo forbesi. Aquatic Living Resources ober- 18(4): 341-351, 2005

Distribution of APGWamide-immunoreactivity in the brain and reproductive organs of adult pygmy squid, Idiosepius pygmaeus. Invertebrate Neuroscience: in 11(2): 97-102, 2011

Statolith comparison of two south-west Atlantic loliginid squid: Loligo sanpaulensis and Loligo gahi. South African Journal of Marine Science 20: 347-354, 1998

Temporal variation in growth rates and reproductive parameters in the small near-shore tropical squid Loliolus noctiluca; is cooler better?. Marine Ecology Progress Series 218: 167-177, 2001

The tropical loliginid squid Sepioteuthis sepioidea from the Northwest Atlantic. J. Fish. Res. Bd Can.: 27: 1892-1893, 1970