La cuenca del Salado: uso y posibilidades de sus recursos pesqueros.

The fishing resources of the Salado Basin are extraordinary important in the context of the inland waters of Argentina. However, the diversity of landscapes in the basin and the lack of continuity in the regional planning , have made difficult a proper management of the fishing resources. This paper has a general overview of the main aspects related to the fishing fauna of the region, with a natural point of view of the processes and mechanisms of the management. A description of the fishes basin community and the identification of the species with commercial and game interests is included . We describe the different fishing gears used in the province for game, commercial and scientific fishing. We review the criteria of diagnosis of the silver side population as a main resource of fishing interest and under this point of view we propose new outlooks to promote a proper management of the resources and its sustainable use. We identify the different kinds of fisheries that are common in the basin and we make a survey of the related socioeconomic aspects. Moreover, we analyze the development of a new institutional and regulatory frame in order to optimize the management of the fishing resources. Finally, we define criteria for ordering and conserving such resources and identify conflict points and requirements for its sustainable use in the context of new proposals for the public policies.

Tidal creek habitats: sentinels of coastal health

Tidal creek ecosystems are the primary aquatic link between stormwater runoff form the land and estuaries. Small tidal creeks begin in upland areas and drain into larger creeks forming a network. The creeks increase in size until they join a tidal river, sound, bay, or harbor that ultimately conect to the coastal ocean. The upper regions or headwaters of tidal creeks are "first responders" to stormwater runoff and are an important habitat for evaluating the impacts of coastal development on aquatic ecosystems. (PDF contains 22 pages)

Fish production, catches and the carrying capacity of the world oceans

A brief review of the status of the world fisheries is presented with emphasis on the differences between catches (= landings + bycatch), biological production of fish, and predation (= production - catches). The ECOPATH II approach implemented as a new, Windows-based software is then shown to allow construction of a stratified world model accoutinng for global catches, production of and predation on fishes, and thus improved estimates of global potentials. A newly initiated, cooperative project is described through which the foundation for such a global model could be constructed, based on a stratified database with more than 100 trophic models. Collaborators are invited to join in this, and will be assisted in constructing models covering their areas of interest.

Forensic Fisheries Science: Literature Review and Research Suggestions

Recent years have seen a dramatic increase in litigation against the National Marine Fisheries Service, NOAA. Litigation may affect personnel throughout the agency, including scientists, whose work is often directly or indirectly influenced by complex legal requirements, but who may not be in a position to comment or engage in public dialogue. It may be helpful for scientists and other agency personnel to join the ongoing discussion in the legal community regarding the interface of science and law. This paper provides a starting point with a selected introduction to relevant legal literature in this area. It uses the phrase “forensic fisheries science” to describe the application of science to legal requirements in the fishery management context. It concludes with suggestions for future research that could assist NMFS scientists as they grapple with the challenge of using science to help the agency meet its complex legal requirements. Forensic: belonging to, used in, or suitable to courts of judicature or to public discussion and debate; argumentative, rhetorical; relating to or dealing with the application of scientific knowledge to legal problems (Merriam-Webster Online Dictionary )

Watershed restoration: a guide for citizen involvement in California.

There is nothing mysterious about how coastal rivers, their estuaries, and their relationship with the sea all work to satisfy many of our greatest needs, including drinkable water, fish and shellfish, and soils essential for sustaining the production of food and fiber. Nor are the methods that have proved successful in the protection and restoration of watershed health difficult to understand. It is difficult, however, to imagine how we are to survive without healthy watersheds. Each watershed along California’s coast shows signs of increasing abuse from road construction and maintenance, livestock grazing, residential development, timber harvesting, and a dozen other human activities. In some cases whole streams have simply been wiped away. This document has been created to guide and support every person in the community, from homemaker to elected official, who wants her or his watershed to provide clean water, harvestable fish resources and other proof that life in the watershed cannot only be maintained but also enjoyed. It is based on years of experience with watershed protection and restoration in California. If citizen involvement is to be effective, it must draw not only on scientific knowledge but also on an understanding of how to translate individual views into commitments and capable group action. This guide briefly reviews the condition of California’s coastal watersheds, identifies the kinds of concerns that have led citizens to successful watershed protection efforts, explains why citizen, in addition to government, effort is essential for watershed protection and restoration to succeed, and puts in the reader’s hands both the technical and organizational “tools of the trade” in the hope that those who use this guide will be encouraged to join in efforts to make their watershed serve this and future generations better.

Recruitment as an evolving random process of aggregation and mortality

The dynamics of the survival of recruiting fish are analyzed as evolving random processes of aggregation and mortality. The analyses draw on recent advances in the physics of complex networks and, in particular, the scale-free degree distribution arising from growing random networks with preferential attachment of links to nodes. In this study simulations were conducted in which recruiting fish 1) were subjected to mortality by using alternative mortality encounter models and 2) aggregated according to random encounters (two schools randomly encountering one another join into a single school) or preferential attachment (the probability of a successful aggregation of two schools is proportional to the school sizes). The simulations started from either a “disaggregated” (all schools comprised a single fish) or an aggregated initial condition. Results showed the transition of the school-size distribution with preferential attachment evolving toward a scale-free school size distribution, whereas random attachment evolved toward an exponential distribution. Preferential attachment strategies performed better than random attachment strategies in terms of recruitment survival at time when mortality encounters were weighted toward schools rather than to individual fish. Mathematical models were developed whose solutions (either analytic or numerical) mimicked the simulation results. The resulting models included both Beverton-Holt and Ricker-like recruitment, which predict recruitment as a function of initial mean school size as well as initial stock size. Results suggest that school-size distributions during recruitment may provide information on recruitment processes. The models also provide a template for expanding both theoretical and empirical recruitment research.

Use of ocean and estuarine habitats by young-of-year bluefish (Pomatomus saltatrix) in the New York Bight

Young-of-year (YOY) blue-fish (Pomatomus saltatrix) along the U.S. east coast are often assumed to use estuaries almost exclusively during the summer. Here we present data from 1995 to 1998 indicating that YOY (30–260 mm FL) also use ocean habitats along the coast of New Jersey. An analysis of historical and recent data on northern and southern ocean beaches (0.1–2 m) and the inner continental shelf (5–27 m) during extensive sampling in New Jersey waters from 1995 to 1998 indicated that multiple cohorts occurred (June–August) in every year. When comparable collections of YOY were made in the ocean and in an adjacent estuary, the abundance was 1–2 orders of magnitude greater on ocean beaches during the summer. The YOY were even more abundant in ocean habitats in the fall (September–October), presumably as a result of YOY leaving estuaries to join the coastal migration south. During 1999 and 2000, YOY bluefish were tagged with internal sequential coded wire microtags in order to refine our under-standing of habitat use and movement. Few (0.04%) of the fish tagged on ocean beaches were recaptured; however, 2.2% of the fish tagged in the estuary were recaptured from 2 to 27 days after tagging. Recaptured fish grew quickly (average 1.37 mm FL/d). On ocean beaches YOY fed on a variety of invertebrates and fishes but their diet changed with size. By approximately 80–100 mm FL, they were piscivorous and fed primarily on engraulids, a pattern similar to that reported in estuaries. Based on distribution, abundance, and feeding, both spring- and summer-spawned cohorts of YOY bluefish commonly use ocean habitats. Therefore, attempts to determine factors affecting recruitment success based solely on estuarine sampling may be inadequate and further examination, especially of the contribution of the summer-spawned cohort in ocean habitats, appears warranted.

Investigation on the species diversity of Pleuronectiformes order in the Iranian coastline water of Persian Gulf

In Iranian Coastline water of Persian Gulf we researched about flat fishes and revision their Scientitic names, Investigated diversity species (Pleuronectiformes) around three provinces such as khouzestan, Bushehr and Hormozgen. The aim focuse on introducting major family and Species Identification for this Purpose 1311 Specimens collected. Then 36 investigation Parameters includes 18 Morphometric, 11 meristic, 7 distribution has been measured in Excel. The descriptive statistic in spss software would be able us to graph dendrograms by Clustering methods, then Design a standerd table and comparised all the datas with it six major family has been found in Iranian Coasline which named: Soleidae, Bothidae Paralichtidae, Cynoglossidae, Psettodidae, Citharidae. Some of the scientific species names such as Pseudorombus arsius, P. annulatus, P. elevatus, P.malayanus, P. triocellatus from Bothidae family Join it to Paralichtidae family and Eurylossa orientalis change It's name from Soleidae family to Brachirus onentalis. Cynoglossus, bilineatus, C.Puncticepts, C.durbaensis, Clachneri, one of the most Important Point that viewed in our samples, founding a new species (C.Sp) Which we couldn't identify it with all the known keys, then sent it to international Scientific references for this porpose. (Family Cynoglossidae); Pseudorombus annulatus, P. elevatus P.arsius, P.malayanus, paralichtodes algoensis, Poecilopstei Javanicus (Family paralichthidae) Arnoglossus aspilos,A.arabicits, Engyprosopon grandisquama, L.pectoralis, Pseudorombus navalensis, Psettina brevirictis (family Bothidae); Psettodes erumei (Family Psettodidae); Citharoides macrolepis (Family Citharidae) in khouzestan Brachirus orientalis, Parachirus marmoratus, solea elongata, Zebrias synapturides (Family Soleidae) Cynoglossus bilineatus, C.puncticeps, C.arel, C.kopsii, C. Capenis (Family cynoglossida); Pseudorombus arsius, P. elevatus, P. malayanus, Poecilopstei javanicus (Family Paralichthidae); Laeops guentheri, Arnoglossus aspilos, Engyprosopon grandisquama (Family Bothidae); Psettodes erumei (Family psettodidae) in Bushehr. Brachirus orientalis, Parachirus marmoratus (Family Soleidae); Cynoglossus arel, C.bilineatus, C.Puncticeps, C. lachheri (Family cynoglossidae); Pseudorombus arisus, P. elevatus, P. malayanus, Poecilopestie j avanicus (Family parlichthidae); Arnoylossus aspilos, A. arabicus, Laeopes guentheri (Family Bothidae); Psettodes erumei (Family Psettodidae); Citharoides macrolepis (Family Citharidae) In Hormozgan. Khozestan has the maximus diversity speices (26 species) and the minimum is Hormozgan (15 Speices). 13 species of five family has never reported inpersian Gulf but we identify them in our studies for the first time. We abserved 29 Species of six family in our studies, comparision between are resualts with other researches shows that this use is the most compelet study in Iranian coastline water of Persian Gulf.