Latitudinal variation in the reproductive cycle and size of the northern rock barnacle Semibalanus balanoides (L.) (Cirripedia, Archaeobalanidae) in the Bay of Fundy

Abstract

The reproductive phenology and size of populations of Semibalanus balanoides were studied at four sites along a latitudinal gradient in the Bay of Fundy. Animals were collected from May 2006 through January 2007, their basal widths measured and the first appearance of immature oocytes, mature oocytes, brooded embryos, and sperm scored. Proceeding from south to north, there was a significant decline in the size of the barnacles and a delay in appearance of all stages. The possible effects of temperature and turbidity are discussed. RESUME La phénologie de la reproduction et la taille des populations de Semibalanus balanoides ont été étudiées dans quatre sites le long d'un gradient latitudinal de la baie de Fundy. Les animaux ont été récoltés de Mai 2006 à Janvier 2007, la largeur de leur base a été mesurée et la première apparition d'oocytes immatures, d'oocytes mûrs, d'embryons, et de sperme notée. Du sud vers le nord, il y a eu une diminution significative de la taille des balanes et un délai dans l'apparition de tous les stades. L'influence possible de la température et de la turbidité est discutée. ')

Recruitment and Post-recruitment Dynamics of the Barnacle Semibalanus balanoides on a Wave-Exposed Headland in Atlantic Canada

“…Thus, the grown recruits seen in October at Western Head may have been reproductive as well. This assumption is further supported by the notion that S. balanoides individuals with basal widths <4 mm are typically non-reproductive (Pineda et al, 2002;Bouchard and Aiken, 2012). We also note that, at Western Head, S. balanoides recruits generally grow larger than at other wave-exposed sites surveyed at the same elevation zone along the Atlantic coast of Nova Scotia.…”

Recruitment and Post-recruitment Dynamics of the Barnacle Semibalanus balanoides on a Wave-Exposed Headland in Atlantic Canada

“…Thus, the grown recruits seen in October at Western Head may have been reproductive as well. This assumption is further supported by the notion that S. balanoides individuals with basal widths <4 mm are typically non-reproductive (Pineda et al, 2002;Bouchard and Aiken, 2012). We also note that, at Western Head, S. balanoides recruits generally grow larger than at other wave-exposed sites surveyed at the same elevation zone along the Atlantic coast of Nova Scotia.…”

Support for the intermittent upwelling hypothesis using 10 years of barnacle recruitment data from a western ocean boundary in Atlantic Canada

“…In Atlantic Canada, Semibalanus balanoides mates in autumn, broods in winter, and releases pelagic larvae in spring ( Bousfield, 1954 ; Crisp, 1968 ; Bouchard & Aiken, 2012 ). The recruitment season (the period during which recruits appear on the substrate after the settlement and metamorphosis of the pelagic larvae) spans May and June on our coast, but most recruits appear in May.…”

Changes in the composition of invertebrate assemblages from wave-exposed intertidal mussel stands along the Nova Scotia coast, Canada

“…One of such drivers is food supply for the larvae, which is related to larval performance and ultimately recruitment ( Vargas, Manríquez & Navarrete, 2006 ). Barnacle larvae are pelagic and, before reaching the last (settling) stage, go over various nauplius stages that feed on phytoplankton for some weeks (5 to 6 for S. balanoides ; Bousfield, 1954 ; Bouchard & Aiken, 2012 ). A proxy for phytoplankton abundance is the concentration of chlorophyll-a (chl-a hereafter) in seawater, which is regularly measured across the globe by satellites ( Mazzuco et al, 2015 ; Lara et al, 2016 ).…”

Recruitment and Post-recruitment Dynamics of the Barnacle Semibalanus balanoides on a Wave-Exposed Headland in Atlantic Canada

“…Thus, the grown recruits seen in October at Western Head may have been reproductive as well. This assumption is further supported by the notion that S. balanoides individuals with basal widths <4 mm are typically non-reproductive (Pineda et al, 2002;Bouchard and Aiken, 2012). We also note that, at Western Head, S. balanoides recruits generally grow larger than at other wave-exposed sites surveyed at the same elevation zone along the Atlantic coast of Nova Scotia.…”

Support for the intermittent upwelling hypothesis using 10 years of barnacle recruitment data from a western ocean boundary in Atlantic Canada

“…In Atlantic Canada, Semibalanus balanoides mates in autumn, broods in winter, and releases pelagic larvae in spring ( Bousfield, 1954 ; Crisp, 1968 ; Bouchard & Aiken, 2012 ). The recruitment season (the period during which recruits appear on the substrate after the settlement and metamorphosis of the pelagic larvae) spans May and June on our coast, but most recruits appear in May.…”

Changes in the composition of invertebrate assemblages from wave-exposed intertidal mussel stands along the Nova Scotia coast, Canada

“…One of such drivers is food supply for the larvae, which is related to larval performance and ultimately recruitment ( Vargas, Manríquez & Navarrete, 2006 ). Barnacle larvae are pelagic and, before reaching the last (settling) stage, go over various nauplius stages that feed on phytoplankton for some weeks (5 to 6 for S. balanoides ; Bousfield, 1954 ; Bouchard & Aiken, 2012 ). A proxy for phytoplankton abundance is the concentration of chlorophyll-a (chl-a hereafter) in seawater, which is regularly measured across the globe by satellites ( Mazzuco et al, 2015 ; Lara et al, 2016 ).…”

Recruitment and Post-recruitment Dynamics of the Barnacle Semibalanus balanoides on a Wave-Exposed Headland in Atlantic Canada

“…Thus, the grown recruits seen in October at Western Head may have been reproductive as well. This assumption is further supported by the notion that S. balanoides individuals with basal widths <4 mm are typically non-reproductive (Pineda et al, 2002;Bouchard and Aiken, 2012). We also note that, at Western Head, S. balanoides recruits generally grow larger than at other wave-exposed sites surveyed at the same elevation zone along the Atlantic coast of Nova Scotia.…”

Support for the intermittent upwelling hypothesis using 10 years of barnacle recruitment data from a western ocean boundary in Atlantic Canada

“…In Atlantic Canada, Semibalanus balanoides mates in autumn, broods in winter, and releases pelagic larvae in spring ( Bousfield, 1954 ; Crisp, 1968 ; Bouchard & Aiken, 2012 ). The recruitment season (the period during which recruits appear on the substrate after the settlement and metamorphosis of the pelagic larvae) spans May and June on our coast, but most recruits appear in May.…”

Changes in the composition of invertebrate assemblages from wave-exposed intertidal mussel stands along the Nova Scotia coast, Canada

“…One of such drivers is food supply for the larvae, which is related to larval performance and ultimately recruitment ( Vargas, Manríquez & Navarrete, 2006 ). Barnacle larvae are pelagic and, before reaching the last (settling) stage, go over various nauplius stages that feed on phytoplankton for some weeks (5 to 6 for S. balanoides ; Bousfield, 1954 ; Bouchard & Aiken, 2012 ). A proxy for phytoplankton abundance is the concentration of chlorophyll-a (chl-a hereafter) in seawater, which is regularly measured across the globe by satellites ( Mazzuco et al, 2015 ; Lara et al, 2016 ).…”