200
H. Mianzan et a!.
based on joint stock assessment, fleet monitoring, establishment of quotas,
and seasonal restrictions; however, the species is clearly overexploited. In
adjacent coastal shelf areas the impact of industrial fisheries, mostly bottom trawling, has still not been assessed but is partially responsible for the
decline in local landings, like the disappearance of the San Antonio Cape
whitemouth croaker fishery grounds (Lasta and Acha 1996). Fisheries in
Samboromb6n Bay and the mouth of Santa Lucia River are mainly artisanal. Despite evidence of a recent decline in overall landings, sciaenids are
the most important resource throughout the year, with M. furnieri generally being caught in winter (Lasta et al. in press). In the Santa Lucia area, M.
furnieri is usually fished with long lines and gill nets during spawning
peak from October to March and the noticeable depletion is attributed to
industrial trawling fisheries (Gratia and Pineiro 1996).
Coastal resources of the Rio de la Plata, including marginal areas of
Samboromb6n Bay and Santa Lucia River, are not properly managed and
regulations for estuarine or maritime waters 2 miles off the coast are
lacking. The Rio de la Plata Treaty (Argentina-Uruguay) establishes regulations for river water and the maritime front, though each country administers its own coastal zone. More recently, promising perspectives applying a
multi-sectorial approach to face coastal problems, are being considered to
produce management recommendations (international agreements, binational action plans, etc.) for the Rio de la Plata estuary.
Acknowledgements. We are grateful to Dr. E. Boschi and A. Lucas for critically reading
the manuscript and to our colleagues Dr. F. Ramirez, Lie. D. Sorarrain, and M.D.
M. Costagliola for making unpublished data available. This is contribution no. 1124 of
the Instituto Nacional de Investigaci6n y Desarrollo Pesquero (INIDEP).
References
Acha EM (1994) Development and occurrence of larvae of the goby, Gobiosoma parri
(Ginsburg) (Gobiidae), in the estuary of the Rio de la Plata, Argentina. Sci Mar
58:337-343
Acha EM (1999) Estrategia reproductiva de la saraca, Brevoortia aurea (Spix y Agassiz,
1829) (Pisces: Clupeidae), en el estuario del Rio de Ia Plata. PhD Thesis, Universidad
Nacional de Mar del Plata, Argentina
Acha EM,Mianzan H, Lasta C, Guerrero R (1999) Estuarine spawning of the whitemouth
croaker (Micropogonias furnieri) in the Rio de Ia Plata, Argentina. Mar Freshwater Res
50:57-65
Acufia A, Arena G, Berois N, Mantero G, Masello A, Nion H, Retta S, Rodriguez M (1997)
The croaker (Micropogonias furnieri): biological cycle and fisheries in the Rio de Ia
Plata and its oceanic front. In: Wells PG, Daborn GR (eds) The Rio de Ia Plata. An envi-
H. Mianzan et a!.
based on joint stock assessment, fleet monitoring, establishment of quotas,
and seasonal restrictions; however, the species is clearly overexploited. In
adjacent coastal shelf areas the impact of industrial fisheries, mostly bottom trawling, has still not been assessed but is partially responsible for the
decline in local landings, like the disappearance of the San Antonio Cape
whitemouth croaker fishery grounds (Lasta and Acha 1996). Fisheries in
Samboromb6n Bay and the mouth of Santa Lucia River are mainly artisanal. Despite evidence of a recent decline in overall landings, sciaenids are
the most important resource throughout the year, with M. furnieri generally being caught in winter (Lasta et al. in press). In the Santa Lucia area, M.
furnieri is usually fished with long lines and gill nets during spawning
peak from October to March and the noticeable depletion is attributed to
industrial trawling fisheries (Gratia and Pineiro 1996).
Coastal resources of the Rio de la Plata, including marginal areas of
Samboromb6n Bay and Santa Lucia River, are not properly managed and
regulations for estuarine or maritime waters 2 miles off the coast are
lacking. The Rio de la Plata Treaty (Argentina-Uruguay) establishes regulations for river water and the maritime front, though each country administers its own coastal zone. More recently, promising perspectives applying a
multi-sectorial approach to face coastal problems, are being considered to
produce management recommendations (international agreements, binational action plans, etc.) for the Rio de la Plata estuary.
Acknowledgements. We are grateful to Dr. E. Boschi and A. Lucas for critically reading
the manuscript and to our colleagues Dr. F. Ramirez, Lie. D. Sorarrain, and M.D.
M. Costagliola for making unpublished data available. This is contribution no. 1124 of
the Instituto Nacional de Investigaci6n y Desarrollo Pesquero (INIDEP).
References
Acha EM (1994) Development and occurrence of larvae of the goby, Gobiosoma parri
(Ginsburg) (Gobiidae), in the estuary of the Rio de la Plata, Argentina. Sci Mar
58:337-343
Acha EM (1999) Estrategia reproductiva de la saraca, Brevoortia aurea (Spix y Agassiz,
1829) (Pisces: Clupeidae), en el estuario del Rio de Ia Plata. PhD Thesis, Universidad
Nacional de Mar del Plata, Argentina
Acha EM,Mianzan H, Lasta C, Guerrero R (1999) Estuarine spawning of the whitemouth
croaker (Micropogonias furnieri) in the Rio de Ia Plata, Argentina. Mar Freshwater Res
50:57-65
Acufia A, Arena G, Berois N, Mantero G, Masello A, Nion H, Retta S, Rodriguez M (1997)
The croaker (Micropogonias furnieri): biological cycle and fisheries in the Rio de Ia
Plata and its oceanic front. In: Wells PG, Daborn GR (eds) The Rio de Ia Plata. An envi-