Developing a non-invasive indicator of pinniped health: Neonate behavior and growth in California sea lions (Zalophus californianus)

作者: David S Green , Julie K Young , Claudia Janetl Hernández-Camacho , LR Gerber

DOI: 10.7773/CM.V36I3.1662

关键词:

摘要: Assessing the healthy life of wildlife populations is critical to achieving conservation goals; however, proper assessments can be complicated when study sites are difficult reach or focal species sensitive human disturbance. Condition and growth offspring may indicate population health, but obtaining such data generally relies on invasive techniques. Here, we examine extent which noninvasive observations neonate behaviors could serve as a proxy for traditional approaches estimating body condition wild pinniped, California sea lion (Zalophus californianus), in Gulf California, Mexico. Generalized linear models multiple regressions were used effect sex, breeding island, year, (e.g., nursing, active) rates. We found strong correlation between individual rates male neonates. Males engaged proportionally more active had lower (beta = –0.0005), whereas males nursing events higher 0.002). There was no relationship behavior either nor female pups. These results provide insight into possibility using an indicator status that facilitate illustrate importance alternative measure animal conservation. Evaluar la salud de poblaciones silvestres es critico para alcanzar metas conservacion; sin embargo, resulta complicado realizar evaluaciones apropiadas cuando los sitios estudio son acceso dificil o especie en cuestion sensible al disturbio humano. La condicion y el crecimiento las crias pueden ser indicadores una poblacion, pero obtener tales datos generalmente requiere tecnicas invasivas. En este se evalua hasta que punto utilizar observaciones invasivas del comportamiento neonatos lugar metodos tradicionales utilizados estimar corporal un pinipedo vida libre, lobo marino Golfo Se utilizaron modelos lineales generalizados regresiones multiples evaluar efecto sexo, isla reproduccion, ano actividad, amamantamiento) tasas crecimiento. encontro fuerte correlacion entre machos. Los machos involucraron mas comportamientos activos tuvieron menores mientras participaron eventos amamantamiento mayores No observo relacion ningun ni hembras. Estos resultados proporcionan informacion sobre posibilidad como indicador estatus machos, cual podria facilitar evaluacion poblacion e ilustrar importancia uso alternativos medir animales conservacion especies.

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