Residency of adult Atlantic cod (Gadus morhua) in the western Gulf of Maine

Fine-scale spatial and temporal genetic structure of Atlantic cod off the Atlantic coast of the USA

“…The spring spawning fish (NSC of our study) do not appear to undertake extensive migrations, but have limited movements along the GOM coast, exhibit spawning site fidelity and have been characterized as 'sedentary residents' (after Robichaud & Rose 2004, Howell et al 2008, Tallack 2009). Cod comprising the SC appear to display more extensive adult movements than do those of the NSC.…”

“…Mar Ecol Prog Ser 410: [177][178][179][180][181][182][183][184][185][186][187][188][189][190][191][192][193][194][195] 2010 the importance of processes that limit dispersal and promote self-replenishment of local populations, such as sedentary adult life history strategies (Robichaud & Rose 2004, Howell et al 2008, spawning site fidelity (Taggart 1997), natal homing (Thorrold et al 2001, Svedäng et al 2007), egg and larval retention (Jones et al 1999, 2005, Bradbury et al 2008) and local adaptation (McIntyre & Hutchings 2003, Conover et al 2006, Hutchings et al 2007). The implications of such fine-scale population structure are important for effective management (Palumbi 2003, Bradbury et al 2008, Reiss et al 2009).…”

“…Using conventional tagging and acoustic tracking studies, Howell et al (2008) documented the presence of 2 distinct groups of cod spawning in Ipswich Bay during the spring and winter. The spring spawning fish (NSC of our study) do not appear to undertake extensive migrations, but have limited movements along the GOM coast, exhibit spawning site fidelity and have been characterized as 'sedentary residents' (after Robichaud & Rose 2004, Howell et al 2008, Tallack 2009).…”

Regional growth estimates of Atlantic cod, Gadus morhua: Applications of the maximum likelihood GROTAG model to tagging data in the Gulf of Maine (USA/Canada) region

“…Since cod are migratory and travel greater or lesser distances depending on the population (Howell et al, 2008;Robichaud and Rose, 2004), they will experience different environments within each year, thus clouding the impact of any one environment. Furthermore, since cod also demonstrate mixing between stock areas (Hunt et al, 1999;Tallack, in review), it is not surprising that the detection of strong, inter-regional differences in cod growth rates can be challenging.…”

“…Cod in the Inshore Gulf of Maine waters have been shown to undertake somewhat limited migrations (Howell et al, 2008), staying mostly along the coastline of Massachusetts, New Hampshire and Maine, and mixing little with cod in other areas (Tallack, in review). Consequently, the potential for cod in this area to experience similar conditions in terms of temperature and food availability, etc., is high, and thus, environmental constraints Fig.…”