Sobre a dinâmica quantitativa populacional / Sobre a dinâmica quantitativa populacional

The purpose of this paper is the analysis of the stability of the equilibrium of biological populations by means of graphical methods, and the application of this analysis in projects of preservation or eradication of natural populations.

Sobre a análise da curva de maturação / Sobre a análise da curva de maturação

The purpose of this paper is the analysis of the relationship between the maturity and the size of an animal. This analysis gives informations on fecundity and growth curve.

SOBRE A ANÁLISE DA CURVA DE MATURAÇÃO / SOBRE A ANÁLISE DA CURVA DE MATURAÇÃO

The purpose of this paper is the analysis of the relationship between the maturity and the size of an animal. This analysis gives informations on fecundity and growth curve.  

SOBRE A DINÂMICA QUANTITATIVA POPULACIONAL / SOBRE A DINÂMICA QUANTITATIVA POPULACIONAL

The purpose of this paper is the analysis of the stability of the equilibrium of biological populations by means of graphical methods, and the application of this analysis in projects of preservation or eradication of natural populations.

Curva de seletividade em redes de emalhar utilizadas na captura de corimbatá, Prochilodus scrofa (Steindachner, 1881) / Curva de seletividade em redes de emalhar utilizadas na captura de corimbatá, Prochilodus scrofa (Steindachner, 1881)

The purpose of this paper is to determine the selection curve of gill-nets used to catch curimbatá, Prochilodus scrofa (Steindachner, 1881), according to Gulland (1969). The result is:  c* (L)=e-0.025(L-l.67m)2 Where: c* (L)= relative frequency of retention,            L = length of the fish, and            m = perimeter of the mesh.

The purpose of this paper is to determine the selection curve of gill-nets used to catch curimbatá, Prochilodus scrofa (Steindachner, 1881), according to Gulland (1969). The result is:  c* (L)=e-0.025(L-l.67m)2 Where: c* (L)= relative frequency of retention,            L = length of the fish, and            m = perimeter of the mesh.

Curva de seletividade em redes de emalhar utilizadas na captura de corimbatá, Prochilodus scrofa (Steindachner, 1881) / Curva de seletividade em redes de emalhar utilizadas na captura de corimbatá, Prochilodus scrofa (Steindachner, 1881)

The purpose of this paper is to determine the selection curve of gill-nets used to catch curimbatá, Prochilodus scrofa (Steindachner, 1881), according to Gulland (1969). The result is:  c* (L)=e-0.025(L-l.67m)2 Where: c* (L)= relative frequency of retention,            L = length of the fish, and            m = perimeter of the mesh.

The purpose of this paper is to determine the selection curve of gill-nets used to catch curimbatá, Prochilodus scrofa (Steindachner, 1881), according to Gulland (1969). The result is:  c* (L)=e-0.025(L-l.67m)2 Where: c* (L)= relative frequency of retention,            L = length of the fish, and            m = perimeter of the mesh.

CURVA DE REPRODUÇÃO DA POPULAÇÃO DE CAMARÃO-SETE-BARBAS, Xiphopenaeus kroyer (HELLER), DA BAÍA DE SANTOS / CURVA DE REPRODUÇÃO DA POPULAÇÃO DE CAMARÃO-SETE-BARBAS, Xiphopenaeus kroyer (HELLER), DA BAÍA DE SANTOS

The purpose of this paper is the determination of the "reproduction curve" of the sea bob shrimp population of Santos  Bay (Brazil, 23°S). This population is exploited by the fishing  fleet of Santos. We got the following relationship:    R= Ne 1.289-.011N                Where:  R = number of recruits per unit effort, N = mean number of individuals per unit  Effort during the spawning period, related with R.

CURVA DE MORTALIDADE DO CAMARÃO-SETE-BARBAS Xiphopenaeus kroyeri (HELLER), DA BAÍA DE SANTOS / CURVA DE MORTALIDADE DO CAMARÃO-SETE-BARBAS Xiphopenaeus kroyeri (HELLER), DA BAÍA DE SANTOS

The purpose of this paper is the determination of the "mortality curve" of the sea bob shrimp population of Baía de  Santos (Brasil, 23°S). This population is exploited by the fishing fleet of Santos. We got the following relationship: where:  M  ( t) = .335N (t)1.03 M ( t) = proportional number of dead individuals in t; N (t) = proportional number of individuals in the beginning of t; t = 2 months.

Curva de rendimento da corvina, Micropogon furnieri (Desmarest, 1822), Jordan, 1884, da costa centro do Estado de São Paulo / CURVA DE RENDIMENTO DA CORVINA, Micropogon furnieri (DESMAREST, 1822), JORDAN, 1884, DA COSTA CENTRO DO ESTADO DE SÃO PAULO

The purpose of this paper is the analysis of the relationship between  total annual catch and fishing intensity of the corvina (brazilian croaker) caught along the center coast of São Paulo State (Brazil, 24ºS). We obtained: C = (32.2 - .0019lE)E where: C = total annual catch (kg) (1959-1971), and   E = fishing intensity (total number of hauls, 3.5 hours of trawling, during the  year). C is maximum (135 712 kg) for E = 8 429 hauls per year.

Curva de rendimento de goete, Cynoscion petranus (Ribeiro,1915), da costa centro do Estado de São Paulo / CURVA DE RENDIMENTO DE GOETE, Cynoscion petranus (RIBEIRO,1915), DA COSTA CENTRO DO ESTADO DE SÃO PAULO

The purpose of this paper is the analysis of the relationship between total annua1 catch and fishing intensity of goete (stone croaker) caught along the center coast of São Paulo State (Brazil, 24°S). We obtained: C = (49.0 - .00324E)E where:C = total annual catch (kg) (1960-1971), and E = fishing intensity (total number of hauls, 3.5 hours of trawling, during the year). C is maximum (185 262 kg) for E = 7 562 hauls per year.

CURVA DE MORTALIDADE DO CAMARÃO-SETE-BARBAS Xiphopenaeus kroyeri (HELLER), DA BAÍA DE SANTOS / CURVA DE MORTALIDADE DO CAMARÃO-SETE-BARBAS Xiphopenaeus kroyeri (HELLER), DA BAÍA DE SANTOS

The purpose of this paper is the determination of the "mortality curve" of the sea bob shrimp population of Baía de  Santos (Brasil, 23°S). This population is exploited by the fishing fleet of Santos. We got the following relationship: where:  M  ( t) = .335N (t)1.03 M ( t) = proportional number of dead individuals in t; N (t) = proportional number of individuals in the beginning of t; t = 2 months.

CURVA DE REPRODUÇÃO DA POPULAÇÃO DE CAMARÃO-SETE-BARBAS, Xiphopenaeus kroyer (HELLER), DA BAÍA DE SANTOS / CURVA DE REPRODUÇÃO DA POPULAÇÃO DE CAMARÃO-SETE-BARBAS, Xiphopenaeus kroyer (HELLER), DA BAÍA DE SANTOS

The purpose of this paper is the determination of the "reproduction curve" of the sea bob shrimp population of Santos  Bay (Brazil, 23°S). This population is exploited by the fishing  fleet of Santos. We got the following relationship:    R= Ne 1.289-.011N                Where:  R = number of recruits per unit effort, N = mean number of individuals per unit  Effort during the spawning period, related with R.

Curva de rendimento de goete, Cynoscion petranus (Ribeiro,1915), da costa centro do Estado de São Paulo / CURVA DE RENDIMENTO DE GOETE, Cynoscion petranus (RIBEIRO,1915), DA COSTA CENTRO DO ESTADO DE SÃO PAULO

The purpose of this paper is the analysis of the relationship between total annua1 catch and fishing intensity of goete (stone croaker) caught along the center coast of São Paulo State (Brazil, 24°S). We obtained: C = (49.0 - .00324E)E where:C = total annual catch (kg) (1960-1971), and E = fishing intensity (total number of hauls, 3.5 hours of trawling, during the year). C is maximum (185 262 kg) for E = 7 562 hauls per year.

Curva de rendimento da corvina, Micropogon furnieri (Desmarest, 1822), Jordan, 1884, da costa centro do Estado de São Paulo / CURVA DE RENDIMENTO DA CORVINA, Micropogon furnieri (DESMAREST, 1822), JORDAN, 1884, DA COSTA CENTRO DO ESTADO DE SÃO PAULO

The purpose of this paper is the analysis of the relationship between  total annual catch and fishing intensity of the corvina (brazilian croaker) caught along the center coast of São Paulo State (Brazil, 24ºS). We obtained: C = (32.2 - .0019lE)E where: C = total annual catch (kg) (1959-1971), and   E = fishing intensity (total number of hauls, 3.5 hours of trawling, during the  year). C is maximum (135 712 kg) for E = 8 429 hauls per year.

Análise complementar da população de sardinha da costa sul do brasil / Análise complementar da população de sardinha da costa sul do brasil

The sardine population of southern coast of Brazil (23°S) exploited by the fishing fleet of Santos, from 1967 to 1970, presented total mortality rate (mean) of 98% per year. The equilibrium of the production per unit effort (Fig.1) suggests a high recruitment according to Santos et al. (1969).

CURVA DE RENDIMENTO DA PESCADA FOGUETE, Macrodon ancylodon (BLOCH, 1801) DA COSTA CENTRO DO ESTADO DE SÃO PAULO / CURVA DE RENDIMENTO DA PESCADA FOGUETE, Macrodon ancylodon (BLOCH, 1801) DA COSTA CENTRO DO ESTADO DE SÃO PAULO

The purpose of this paper is the analysis of the relationship between total annual catch and fishing intensity of the pescada foguete (king weakfish) caught along the center coast of São Paulo State (Brazil, 24°S). We obtained:C = (67.7 - .00355E)E where: C = total annual catch(kg)(1959-1971), and E = fishing intensity (total number of hauls, 3.5 hours of trawling, during the year). C  is maximum (322 767 )for E = 9 535 hauls per year.

CURVA DE RENDIMENTO DO CAMARÃO-SETE-BARBAS, Xiphopeneus kroyeri (HELLER), DA BAÍA DE SANTOS E ADJACÊNCIAS / CURVA DE RENDIMENTO DO CAMARÃO-SETE-BARBAS, Xiphopeneus kroyeri (HELLER), DA BAÍA DE SANTOS E ADJACÊNCIAS

The purpose of this paper is the analysis of the relationship between total annual catch and fishing intensity of the sea bob shrimp, caught near the Santos Bay (Brazil, 23ºS). We obtained: C = (63.7 -.00l00E)E where: C = total annual catch (kg) (1959-1971), and E = fishing intensity (total number of hauls, 2.5 hours of trawling, during the year). C is maximum (1 014 422 kg) for E = 31 850 hauls per year.

CURVA DE RENDIMENTO DO CAMARÃO-SETE-BARBAS, Xiphopeneus kroyeri (HELLER), DA BAÍA DE SANTOS E ADJACÊNCIAS / CURVA DE RENDIMENTO DO CAMARÃO-SETE-BARBAS, Xiphopeneus kroyeri (HELLER), DA BAÍA DE SANTOS E ADJACÊNCIAS

The purpose of this paper is the analysis of the relationship between total annual catch and fishing intensity of the sea bob shrimp, caught near the Santos Bay (Brazil, 23ºS). We obtained: C = (63.7 -.00l00E)E where: C = total annual catch (kg) (1959-1971), and E = fishing intensity (total number of hauls, 2.5 hours of trawling, during the year). C is maximum (1 014 422 kg) for E = 31 850 hauls per year.

CURVA DE RENDIMENTO DA PESCADA FOGUETE, Macrodon ancylodon (BLOCH, 1801) DA COSTA CENTRO DO ESTADO DE SÃO PAULO / CURVA DE RENDIMENTO DA PESCADA FOGUETE, Macrodon ancylodon (BLOCH, 1801) DA COSTA CENTRO DO ESTADO DE SÃO PAULO

The purpose of this paper is the analysis of the relationship between total annual catch and fishing intensity of the pescada foguete (king weakfish) caught along the center coast of São Paulo State (Brazil, 24°S). We obtained:C = (67.7 - .00355E)E where: C = total annual catch(kg)(1959-1971), and E = fishing intensity (total number of hauls, 3.5 hours of trawling, during the year). C  is maximum (322 767 )for E = 9 535 hauls per year.

ANÁLISE COMPLEMENTAR DA POPULAÇÃO DE SARDINHA DA COSTA SUL DO BRASIL / ANÁLISE COMPLEMENTAR DA POPULAÇÃO DE SARDINHA DA COSTA SUL DO BRASIL

The sardine population of southern coast of Brazil (23°S) exploited by the fishing fleet of Santos, from 1967 to 1970, presented total mortality rate (mean) of 98% per year. The equilibrium of the production per unit effort (Fig.1) suggests a high recruitment according to Santos et al. (1969).