Seasonal changes in the food quality, diel feeding rhythm and growth rate of juvenile leaping grey mullet Liza saliens

SynopisPresent knowledge of animal communities associated with the algae of the Firth of Clyde is briefly reviewed. New work is presented on Hyale nilssoni (Rathke), the commonest amphipod inhabiting high littoral seaweeds, which describes the life-history characteristics over three years of a population associated with Pelvetia. Seasonal changes in growth rate, sex ratio and breeding status are described. Fecundity is investigated and data on brood and egg sizes compared with populations from other latitudes. The dynamic equilibrium between the grazer (Hyale) and the grazed (Pelvetia) is described.

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A British population of the grey mullet, Liza aurata (Teleostei: Mugilidae)

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s002531540002631x ◽

1987 ◽

Vol 67 (1) ◽

pp. 1-10 ◽

Cited By ~ 3

Author(s):

P. J. Reay

Keyword(s):

Growth Rate ◽

Population Structure ◽

Relative Abundance ◽

Seasonal Occurrence ◽

Grey Mullet ◽

Direct Information ◽

Liza Aurata ◽

Spawning Areas

Relative abundance, seasonal occurrence, population structure and growth-rate are described for a population of the grey mullet Liza aurata from Langstone Harbour, Hampshire. The occurrence of juveniles as small as 21 mm is interpreted as evidence for spawning in British waters, but no direct information on spawning areas or spawning seasons was obtained.

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Seasonal changes in feeding rhythm ofMeriones hurrianaein the Indian desert

Journal of Interdisiplinary Cycle Research ◽

10.1080/09291018409359842 ◽

1984 ◽

Vol 15 (2) ◽

pp. 133-138

Author(s):

Ranjan Advani ◽

Mohamad Idris ◽

Ishwar Prakash

Keyword(s):

Seasonal Changes ◽

Indian Desert ◽

Feeding Rhythm

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Interactive effects of genotype and food quality on consumer growth rate and elemental content

Ecology ◽

10.1002/ecy.1795 ◽

2017 ◽

Vol 98 (5) ◽

pp. 1399-1408 ◽

Cited By ~ 15

Author(s):

Clay Prater ◽

Nicole D. Wagner ◽

Paul C. Frost

Keyword(s):

Growth Rate ◽

Food Quality ◽

Interactive Effects ◽

Elemental Content

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Slower Growth Results in Larger Otoliths: An Experimental Test with Guppies (Poecilia reticulata)

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f89-014 ◽

1989 ◽

Vol 46 (1) ◽

pp. 108-112 ◽

Cited By ~ 115

Author(s):

David Reznick ◽

Eric Lindbeck ◽

Heather Bryga

Keyword(s):

Growth Rate ◽

Food Quality ◽

Experimental Test ◽

Growth Rates ◽

Aquatic Environment ◽

Genetic Background ◽

Poecilia Reticulata ◽

Daily Increments ◽

Otolith Size ◽

Age Structures

We demonstrate that slowly growing guppies (Poecilia reticulata) have larger otoliths than equal-sized, rapidly growing guppies. This relationship has been suggested by previous authors, but they compared wild or pond-reared fish from different poopulations, thereby confounding their observations with the different environments. Our experiment controlled for the genetic background, food quality, and the aquatic environment and assessed the influences of food availability and growth rate on relative otolith size. This difference in relative otolith dimensions could aid in comparing growth rates among populations or could improve the use of otolith dimensions for estimating population age structures. In both cases, these methods could also complement data based on counting daily increments or annuli on otoliths and other structures to characterize growth rates and age structures.

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Winter temperature and food quality affect age at maturity: an experimental test with Atlantic salmon (Salmo salar)

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f2012-108 ◽

2012 ◽

Vol 69 (11) ◽

pp. 1817-1826 ◽

Cited By ~ 13

Author(s):

Bror Jonsson ◽

Anders G. Finstad ◽

Nina Jonsson

Keyword(s):

Growth Rate ◽

Atlantic Salmon ◽

Direct Effect ◽

Salmo Salar ◽

Food Quality ◽

Condition Factor ◽

Sea Water ◽

Winter Temperature ◽

Age At Maturity ◽

Atlantic Salmon Salmo Salar

Field studies have revealed that many ectotherms mature younger and smaller in warmer environments although they grow faster. This has puzzled ecologists because the direct effect of factors that accelerate growth is expected to be larger, not smaller size. We tested this experimentally for Atlantic salmon (Salmo salar) at two winter temperatures and diets. Logistic regression revealed that the probability of maturation during the second year in sea water, relative to the probability of older maturation, increased with temperature and growth rate during the first winter. Also, large size and high condition factor 1 year prior to maturation stimulated maturation. In females, a high lipid diet increased the probability of maturation as one-sea-winter fish, and there were significant interactions between winter temperature and food quality and between body size and condition factor the first autumn in sea water. Thus, if the direct effect of temperature on growth rate is the main effect of warming, salmon are likely to attain maturity younger and smaller. Also, richer food decreased age at maturation in females. This finding has consequences for interpretations of climate change impacts on age at maturity in Atlantic salmon and may also hold for many other ectotherm species.

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