Comparative analysis between gill netting and sport fisher catches in a small patagonic andean lake: its implications for resource evaluation and management
Keywords:
sport fisheries, Patagonian lakes, fishing nets, fisher catchesAbstract
Knowledge of lake fish communities of Argentine Patagonia has grown in the past 20 years thanks to the use of gill nets. However, National Park officials and Fisher organizations dislike their use and would prefer the use of recreational fisher catch data. The present paper addresses advantages and disadvantages of using gill nets as compared to fishers. This was accomplished by analysis of gill net and fisher catch data from Lake Guillelmo, Parque Nacional Nahuel Huapi for the period 1997-1999. Both sets of data revealed the presence of only two salmonids, brook trout (Salvelinus fontinalis) and rainbow trout (Oncorhynchus mykiss). However, relative abundances of each species differed between fishing techniques, rainbow trout being dominant according to fisher catches and brook trout according to gill net catches. In addition, differences in size, age and spatial distribution brought about by the highly selective nature of fisher catches were clearly observed. This shows that fisher catch data can only be used to assess existing recreational Patagonian lake fisheries in terms of current or historical trends in catch composition, structure and fishing pressure. Studies of community composition, structure and processes leading to conservation or recreational fishery management should rely on gill net sampling designs tailored to different ecological and management questions, which can be complemented by fisher catch data.
References
GRIFFITH, JS. 1974. Utilization of invertebrate drift by brook trout, (Salvelinus fontinalis), and cutthroat (Salmo, clarkii in small stream in Idaho. Trans Am Fish Soc. 103(3):440-447.
GUTHRIE, DJ; JM HOENIG; M HOLIDAY; CM JONES; MJ MILLS; ET AL. 1991. Pp. 12-528 in: Creek land angler surveys in fisheries management. American Fisheries Society Simposium.
LANGELAND, A; JH L’ABEE-LUND; B JONSSON & N JONSSON. 1991. Resource Partitioning and Niche Shift in Arctic Charr Salvelinus alpinus and Brown Trout Salmo trutta. The Journal of Animal Ecology 60(3):895-912.
MC CORMICK, JH; KEF HOKASON & BR JONES. 1972. Effects of temperatures on growth and survival of young brook trout, Salvelinus fontinalis. Journal of the Fisheries Research Board of Canada 29:1107-1112.
MAC CRIMMON, HR & TL MARSHALL. 1968. World distribution of brown trout, Salmo trutta. J. Fish. Res. Board Can. 25:2527-2548.
MACCHI, PJ. 2004. Respuesta de las poblaciones de Galaxias maculatus a la depredación por parte de Percichthys trucha y los salmónidos introducidos en la patagonia. Tesis doctoral CRUB-UNCo. Pp. 174.
MACCHI, PJ; MA PASCUAL & PH VIGLIANO. 2007. Differential piscivory of the native Percichthys trucha and exotic salmonids upon the native forage fish Galaxias maculatus in Patagonian Andean lakes. Limnologica 37:76-87.
MERMOZ, M & C MARTIN. 1987. Mapa de vegetación del Parque y Reserva Nacional Nahuel Huapi. SECyT. Administración de Parques Nacionales, Delegación Regional Patagonia. Pp. 24.
PASCUAL, M; P MACCHI; J URBANSKI; F MARCOS; C. RIVA ROSSI; ET AL. 2002. Evaluating potential effects of exotic freshwater fish from incomplete species presence-absence data. Biological Invasions 4:101-113.
PASCUAL, M; V CUSSAC; B DYER; D SOTO; P VIGLIANO; ET AL. 2007. Freshwater fishes of Patagonia in the 21st Century after a hundred years of human settlement, species introductions, and environmental change. Aquatic Ecosystem Health 10(2):212-227.
QUIRÓS, R & C BAIGÚN. 1984. Prospección pesquera en 33 lagos y embalses pàtagónicos. Taller internacional sobre ecología y manejo de peces patagónicos. Copescal, Documento Técnico 4:159-179. FAO, Roma. Italia.
RECHENCQ, M. 2003. Análisis de capturas de pesca recreacional en el Río Limay mediante el empleo de pescadores voluntarios. Tesis de Licenciatura en Biología. Centro Regional Universitario Bariloche, Universidad Nacional del Comahue. Río Negro. Argentina.
SERVICIO METEOROLOGICO NACIONAL. 1961- 2009. Aeropuerto Bariloche, historical data. www.smn.gov.ar.
SCOTT, W & E CROSSMAN. 1973. Freshwaters fishes of Canada. Bulletin of the Fisheries Research Board of Canada 184:996.
VIGLIANO, PH & GE LIPPOLT. 1991a. Factibilidad de aplicación de las metodologías de entrevistas “creel census” en ambientes cordilleranos de la provincial de Río Negro, Argentina. Pp. 339 en: Oltremari Arregui, J (eds.). Actas II Congreso de Gestión en Recursos Naturales. Valdivia Chile.
VIGLIANO, PH & GE LIPPOLT. 1991b. El factor humano de la pesca deportiva y recreacional de salmónidos en el lago Fonck, provincia de Río Negro, Argentina. Medio Ambiente, Chile 11:69-78.
VIGLIANO, P; M ALONSO; P MACCHI; M DENEGRI Y G LIPPOLT. 1998. Uso de registros de pesca personales en la evaluación y manejo de pesquerías deportivas. Natura Neotropicalis 29(1):1-7.
VIGLIANO, PH; P MACCHI; MA DENEGRI; M ALONSO; DA MILANO; ET AL. 1999. Un diseño modificado y procedimiento de calado de redes agalleras para estudios cuali-cuantitativos de peces por estratos de profundidad en lagos araucanos. Natura Neotropicalis 30(1-2):1-11.
VIGLIANO, PH & MF ALONSO. 2000. Potencial económico de la pesca recreacional en la Argentina: una forma de pesca artesanal poco conocida y su posible impacto en economías regionales de paises no desarrollados. Gayana 64(1):71-76.
VIGLIANO, PH & MF ALONSO. 2007. Salmonid introductions in Patagonia: A mixed blessing. Pp. 18 in: Bert, TM (ed.). Ecological and genetic Implications of aquaculture Activities. Springer. Netherlands.
VINCENT, RE & WH MILLER. 1969. Altitudinal distribution of brown trout and others fishes in a headwater tributary of the South Platte River, Colorado. Ecology 50(3):464-466.
WEBSTER, D. 1975. Proceedings of Brook trout seminar. Wins. Dept. Nat. Resour. Univ. Wisc. Pp. 16.
SUPPLEMENTARY INFORMATION*: www.ecologiaaustral.com.ar.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2011 Gustavo E. Lippolt, Pablo H. Vigliano, Marcelo F. Alonso, Patricio J. Macchi, Daniela Milano, María A. Denegri, Martín García Asorey
This work is licensed under a Creative Commons Attribution 3.0 Unported License.
Authors retain their rights as follows: 1) by granting the journal the right to its first publication, and 2) by registering the published article with a Creative Commons Attribution License (CC-BY 4.0), which allows authors and third parties to view and use it as long as they clearly mention its origin (citation or reference, including authorship and first publication in this journal). Authors can make other non-exclusive distribution agreements as long as they clearly indicate their origin and are encouraged to widely share and disseminate the published version of their work.
