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Among all vertebrates, gobies are second in diversity only to the teleost family Cyprinidae. The Gobiidae consists of more than 200 genera and nearly 2,000 species and make up the largest family of marine fishes. Gobies account for as much as 50% of the energy flow in coral reef communities. Their small size, ability to adapt to numerous ecological
This book provides a comprehensive review of hermaphroditism in fishes. It focuses on the behavioral ecology of functional hermaphroditism in fishes and discusses its evolution. Approximately 99% of all vertebrate species consist of separate-sex individuals (gonochorists), i.e., pure males and pure females. The other 1% of vertebrate species are hermaphroditic, and almost all of them are fishes. Among hermaphroditic fishes, four major types of hermaphroditism are known: simultaneous (or synchronous) hermaphroditism, protandry (male-to-female sex change), protogyny (female-to-male sex change), and bidirectional sex change (or reversed sex change in protogynous species). The book examines the occurrence of hermaphroditism in relation to phylogeny and mating systems. It also reviews the hypotheses for the evolution of hermaphroditism, and the size-advantage model, which is the main theory for the evolution of sex change, tested in relation to the mating system. The appendix in the last chapter provides an annotated list of hermaphroditic fish species (ca. 500 spp.).
This edited volume reviews our past and present understanding of the ecology of Australian freshwater fishes. It compares patterns and processes in Australia with those on other continents, discusses the local relevance of ecological models from the northern hemisphere and considers how best to manage our species and their habitats in the face of current and future threats. In view of these challenges, the need for redress is urgent. The chapters are written by some of our foremost researchers and managers, developing themes that underpin our knowledge of the ecology, conservation and management of fish and fish habitats. For each theme, the authors formulate a synthesis of what is known, co...
This document reviews and compiles the scientific information available on the new and non-indigenous fish and decapod crustacean species in the Adriatic Sea, central Mediterranean Sea. For fish, the new species are those whose presence in the Adriatic Sea was recorded recently, since the year 2000. For decapod crustaceans, only alien species found in the Adriatic Sea after the Second World War are dealt with. In total, 15 crustaceans and 52 fish species were selected and presented in this handbook. Following an introductory section, giving a general overview on the Adriatic Sea geographical characteristics, this document reviews, in its first part, the ichthyofauna and decapod crustaceans in the area. The second part of the document provides a description of each new species including synonyms, meristic formula, main morphologic features, bio-ecology, known geographical distribution, relevance and reference literature. This work was designed and implemented within the framework of the FAO-AdriaMed Project “Scientific Cooperation to Support Responsible Fisheries in the Adriatic Sea”.