Scholarlink

<p>This article examines the interactions between seabob shrimp trawling and six seabird species in Ilha Comprida, São Paulo, Brazil. The species studied include the brown booby, magnificent frigatebird, Cabot’s tern, royal tern, kelp gull, and Neotropic cormorant. Observations were conducted along a 70&#xa0;km beach transect, with a width of 300&#xa0;m from the waterline, by driving at an average speed of 20&#xa0;km/h. The Pearson correlation coefficient was used to assess the relationship between seabird abundance and the number of shrimp fishing boats. The magnificent frigatebird showed a strong correlation, with the highest abundance within the first 20&#xa0;km of the southernmost region, particularly between September and February, aligning with peak fishing season. The royal tern exhibited a moderate correlation, with consistent abundance up to kilometer 35 and peak concentrations within the first 5&#xa0;km. Kelp gulls had a weaker correlation, with the greatest sightings within the first 40&#xa0;km, predominantly from June to February. Brown boobies demonstrated a moderate correlation, with increased abundance starting from the 13th boat, primarily distributed within the first 20&#xa0;km, peaking in September. The Neotropic cormorant had a very weak correlation, showing a uniform distribution mainly within the first 15&#xa0;km, with presence during spring-summer, from August to February. This study highlights the spatial and temporal relationships between shrimp trawling activities and seabird distribution, emphasizing the varying degrees of dependency of each species on fishing activities.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Abundance and seasonal association of seabirds with seabob shrimp trawling at Ilha Comprida, São Paulo, Brazil

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月1日

查看全文
  • Allan Clé Porto,
  • Edison Barbieri

摘要

This article examines the interactions between seabob shrimp trawling and six seabird species in Ilha Comprida, São Paulo, Brazil. The species studied include the brown booby, magnificent frigatebird, Cabot’s tern, royal tern, kelp gull, and Neotropic cormorant. Observations were conducted along a 70 km beach transect, with a width of 300 m from the waterline, by driving at an average speed of 20 km/h. The Pearson correlation coefficient was used to assess the relationship between seabird abundance and the number of shrimp fishing boats. The magnificent frigatebird showed a strong correlation, with the highest abundance within the first 20 km of the southernmost region, particularly between September and February, aligning with peak fishing season. The royal tern exhibited a moderate correlation, with consistent abundance up to kilometer 35 and peak concentrations within the first 5 km. Kelp gulls had a weaker correlation, with the greatest sightings within the first 40 km, predominantly from June to February. Brown boobies demonstrated a moderate correlation, with increased abundance starting from the 13th boat, primarily distributed within the first 20 km, peaking in September. The Neotropic cormorant had a very weak correlation, showing a uniform distribution mainly within the first 15 km, with presence during spring-summer, from August to February. This study highlights the spatial and temporal relationships between shrimp trawling activities and seabird distribution, emphasizing the varying degrees of dependency of each species on fishing activities.