Some marine invertebrate larvae expand the range of settlement cues to which they will respond as they age. How do relatively simple larvae achieve such complex changes in behaviour? Larvae of the Australian sea urchin Holopneustes purpurascens settle and metamorphose specifically in response to a settlement cue, dissolved histamine, produced by the host alga Delisea pulchra. Older H. purpurasc...

Conflict arises among social organisms when individuals differ in their inclusive-fitness interests. Ant societies are excellent models for understanding how genetic relatedness mediates conflict intensity. However, although conflicts within colonies typically arise over offspring production, the role of larvae as actors in social conflict has received little attention. We develop and empirical...

there are various factors affecting the fighting fish larval survival including nutrition, substrate, water quality, pathogen and stress. experiments were conducted to study the effect of substrate and live feed on larval survival of fighting fish fry. nine small glass aquaria (60 cm × 30 cm × 30 cm) were used as breeding tanks. equal pieces (80 cm2) of rigifoam (t1), polythene (t2) and banana ...

The research required in relation to the nutrition of bluefin tuna (BFT) is great. In previous trials in the domestication of large scombrids and in current capture-fattening schemes, nutritional studies have been few. Therefore, virtually nothing is presently known about the nutritional requirements for these species. Nutritional factors are important in any domestication programme in a variet...

Animals from flies to humans adjust their development in response to environmental conditions through a series of developmental checkpoints, which alter the sensitivity of organs to environmental perturbation. Despite their importance, we know little about the molecular mechanisms through which this change in sensitivity occurs. Here we identify two phases of sensitivity to larval nutrition tha...

We examined the relative importance of parental nutritional condition and larval food ration on the rates of development, growth and metamorphosis of larvae of Strongylocentrotus droebacḧ iensis (Muller) in a laboratory experiment. Parents were reared for 22 months on either a high 21 ration of kelp (Laminaria spp., 6 days week ) supplemented with mussel flesh (Mytilus spp., 1 21 21 day week ) ...