A review of the general biology, ecology, population dynamics, reproduction and culture methods of marine bivalves of the family Arcidae, subfamily Anadarinae. These cockles are harvested on a subsistence basis in many tropical, subtropical and warm temperate areas. The important species are Anadara granosa (L.), A. subcrenata (Lischke) and A. broughtoni (Schrenk).
The goal of food security increasingly serves as an objective and justification for marine conservation in the global south. In the marine conservation literature this potential link is seldom based upon detailed analysis of the socioeconomic pathways between fish and food security, is often based on limited assumptions about increasing the availability of fish stocks, and downplays the role of trade. Yet, the relationship between fish and food security is multi-faceted and complex, with various local contextual factors that mediate between fish and food security.
Sea cucumber fisheries exemplify resource systems under intense exploitation pressure from lucrative Asian markets. Plagányi et al. (1) model the performance of rotational harvests of sea cucumbers on the Great Barrier Reef (GBR) and advocate it globally. The authors support their aim to evaluate management models but believe the tenets of the strategy are flawed, key model inputs bias the outputs, and inferences to other coastal fisheries are overreaching.
Few studies of the riverine fish of the Athi-Galana-Sabaki river drainage area in Kenya have been carried out since the last comprehensive surveys of the 1950s and early 1960s. This paper presents updated information on scientific and recommended common names, distribution and ecology of selected fish species of this catchment. At least 28 riverine fish families consisting of 46 genera and 62 species occur in the drainage system, of which, 39 species are strictly freshwater (4 introduced) while 23 species are of marine origin.
This paper aims to demonstrate the use of global marine biodiversity databases, such as SeaLifeBase and Fishbase, to provide a preliminary assessment of marine biodiversity in the Philippines, where it is at its apex. SeaLifeBase, a joint activity of the Sea Around Us project of the University of British Columbia and the WorldFish Center, is patterned after the popular online database on fish, FishBase.
Anecdotal evidence from 60 marine species suggests a pattern of resource exhaustion rather than sustainable use. There is a reason to believe that biomass in the Atlantic Western Boundary Current Fishery-Grand Banks, Newfoundland, North Atlantic, Norwegian Sea, Barents Sea is 3-10% of what it was when fishing was started. Selective removal of large species may have caused major nutrient distribution in both rich and poor waters.
This chapter discusses how small-scale fisheries dependent human communities are interactive with marine ecosystems. It has shown how changes in the marine ecosystems can impact human fishing communities, and also how the responses to these human communities can exacerbate or ameliorate ecosystem changes.
The Tanzanian marine environment has been under threat for quite a long time now due to human activities. With the establishment of the Marine Parks and Reserve Act in 1994, several areas have been earmarked as marine parks. This act is aimed at conserving and protecting the marine environment all along the Tanzanian coastline. Once the parks and reserves are established and these areas brought under control, there will be a reduction in the illegal operations along the coast.
The United Kingdom Overseas Territories (UKOT) of Anguilla, British Virgin Islands and Montserrat are in the Lesser Antilles, in the northeast Caribbean. All are small. Tropical storms and hurricanes are the most common causes of natural disturbance in this region, and for the Atlantic basin as a whole there has been an increase in the number of strong hurricanes since 1995. In Montserrat, volcanic activity is the outstanding environmental problem, and this has caused extensive destruction in the last few years.
This contribution provides an approach for constructing models of large marine ecosystems (LMEs). This contribution results from an attempt to follow up on some of the implications of the LME concept for ecological modeling, especially approaches that place emphasis on fish and other living resources, and hence on fisheries management.