Abundance of the Ommastrephes bartramii winter-spring cohort fluctuated greatly from 1995 to 2004. To understand how abundance was influenced by sea surface conditions, we examined the variations in the proportion of thermal habitats with favourable sea surface temperature (SST). The SST data of both the spawning and feeding grounds were used to calculate the monthly proportion of favourable-SS...

Although individuals in many Wsh species move to shallow waters to spawn, the California grunion (Leuresthes tenuis) is almost unique in its constitutive display of synchronous full-emergence beach spawning. During a spawning event, Wsh ride large waves onshore to spawn on beach land, where their eggs incubate terrestrially. Here, we employ molecular markers to ascertain how this unusual reprod...

The effects of various salinity levels among (0‰, 5‰, 10‰, 15‰, and 20‰) for successful breeding of Common carp, Cyprinus carpio were investigated. The duration of study was 75 days. Ripe broodstock (30) having a mean weight (male 1027±2.4g and female 1084.8±23g) were selected and stocked into spawning tanks (2000-liter). The Ratio among male and female was 2:1. They were fed with commercial fl...

The tautog, Tautoga onitis (Linnaeus), ranges from Nova Scotia to South Carolina and has become a popular target for recreational and com­ mercial fisheries. Although tautog are a multiple spawning species, reproductive potential, measured as annual fecun­ dity, has not been estimated previously with methods (batch fecundity, spawn­ ing frequency) necessary for a species with indeterminate annu...

Wolves (Canis lupus) in North America are considered obligate predators of ungulates with other food resources playing little role in wolf population dynamics or wolf prey relations. However, spawning Pacific salmon (Oncorhyncus spp.) are common throughout wolf range in northwestern North America and may provide a marine subsidy affecting inland wolf-ungulate food webs far from the coast. We co...

The spawning of the muricid gastropod Plicopurpura pansa in the laboratory at 22-23 degrees C is described. Females deposited 1-20 capsules daily for at least 20 weeks, and produced up to 150 capsules each per spawning season. During spawning, egg clusters were formed consisting of hundreds of capsules of different ages deposited by different females. Each egg capsule contained an average of 43...

Abiotic factors are fundamental drivers of the dynamics of wild marine fish populations. Identifying and quantifying their influence on species targeted by the fishing industry is difficult and very important for managing fisheries in a changing climate. Using multiple regression, we investigated the influence of both temperature and rainfall on the variability of recruitment of a tropical spec...