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CLIMATE CHANGE AND GLOBAL FISH PERFORMANCE IN NIGERIA (A CASE STUDY OF RIVERS STATE) CHAPTER ONE

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 Format: MS WORD ::   Chapters: 1 - 5 ::   Pages: 120 ::   Attributes: Questionnaire, Data Analysis, Abstract  ::   76 people found this useful

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FISHERY AND AQUACULTURE UNDERGRADUATE PROJECT TOPICS, RESEARCH WORKS AND MATERIALS

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CHAPTER ONE

INTRODUCTION

BACKGROUND OF THE STUDY

Global marine fisheries not only face overfishing, pollution and other anthropogenic impacts, but also climate change (Halpern et al., 2008; Pauly et al., 2002). Climate change is the most widespread anthropogenic threat for ocean ecosystems (Halpern et al., 2008), causing sea-level rise, sea temperature change, ocean acidification, changes in precipitation and changes in ocean circulation (Brander, 2007). These climate effects on ocean conditions will impact ocean organisms, the composition of marine communities and ecosystem function (Brown et al., 2010), increasing the complexity of the challenges facing current fisheries (Sumaila et al., 2011). Climate change impacts fish stocks either directly or indirectly. Direct impacts affect the physiology and behaviour and alter growth, reproductive capacity, mortality and distribution. Indirect effects change the productivity, structure and composition of the marine ecosystems on which fish depend (Brander, 2010; Hare et al., 2010; Perry et al., 2005). Changes in the geographic distribution of fish species in marine ecosystems have already been documented throughout the world (Barange and Perry, 2009; Brander et al., 2003; Perry et al., 2005), and several studies have predicted that changes in water temperature, driven by climate change, may lead to local extinctions and also to colonization by species previously absent in those areas (Cheung et al., 2009; Vinagre et al., 2011). These shifts in geographic range will most likely affect the abundance, distribution and composition of fisheries catches, and consequently fishing operations, catch shares and the effectiveness of fisheries management measures (Gamito et al., 2013; Kim, 2010; Sumaila et al., 2011). However, these effects might not necessarily be negative, as new fishing opportunities may also arise in some areas of the world. The effects of climate change on fisheries may then be regarded to act on resource availability, fishing operations, fisheries management and conservation measures and profits from fisheries (Cheung et al., 2012). Both the observation of recent climate change and predictions of climate change in future scenarios show that the effects of climate change will not be homogeneous throughout the world (IPCC, 2007). Belkin (2009) has studied changes in sea surface temperature (SST) in large marine ecosystems (LMEs). LMEs are large coastal areas with broad ecosystem similarities, such as bathymetry, hydrography, productivity and trophically dependent populations (Sherman and Duda, 1999; Watson et al., 2004). Belkin (2009) has found a coherent global pattern of rapid warming in LMEs, from 1982 to 2006. This rapid warming (net SST change higher than 0.6 ºC) was observed for three groups of LMEs: (1) Scotian Shelf, Newfoundland-Labrador Shelf, Canadian Eastern Arctic-West Greenland, Iceland Shelf and Sea, Faroe Plateau and Norwegian Sea; (2) North Sea, Baltic Sea, Black Sea, Mediterranean Sea, Iberian Coastal and Celtic-Biscay Shelf; (3) Yellow Sea, East China Sea, Japan/East Sea and Kuroshio Current. A slow warming was observed in the Indian Ocean LMEs and most LMEs around Australia and between Australia and Indochina. The only cooling LMEs were the California Current and the Humboldt Current, both located in the Eastern Pacific upwelling areas. As the LME spatial system groups together large coastal areas with similar ecosystem characteristics, this methodology has recently been used for several large-scale marine studies (Merino et al., 2012; Pauly et al., 2008; Pikitch et al., 2014; Sherman and Duda, 1999; Watson et al., 2004). From a global perspective, analyses on the LME scale are extremely valuable for marine ecosystem-based management. And, as climate change increases the complexity of fisheries management, it is of the utmost importance that these analyses include the effects of climate change on fisheries. Therefore, the present paper aimed to analyse climate change and global fish performance.

1.2 STATEMENT OF PROBLEM

There is an increasing concern over the consequences of climate change and fish performance and the state of marine ecosystems. Climate change is an additional pressure on top of the many (fishing mortality, loss of habitat, pollution, disturbance, introduced species) which fish stocks already experience. This means that the impact of climate change must be evaluated in the context of other anthropogenic pressures, which often have greater and more immediate effects. It will be proper to assemble and analyse evidence of effects of climate on fish performance in order to (i) show that climate affects the distribution, productivity and resilience of fish stocks, (ii) develop our understanding of the processes, and (iii) draw lessons from past experience. The scientific study of the impacts of climate change on fish performance has developed very rapidly, but is unevenly spread geographically and methodologically. Until the past decade or so the principal subject for investigation was the effect of climate variability (i.e. decadal and shorter variability) on recruitment, with related work on regime shifts and on distribution changes.

1.3 AIMS OF THE STUDY

The major purpose of this study is to examine the effect of climate change and global fish performance. Other general objectives of the study are:

1. To examine the nature of climate change.

2. To examine fishery performance and its adaptation on climate change.

3. To examine climate change and its effects on fish production.

4. To examine the problems fish farmers face due to effects of climate change.

5. To examine the relationship between climate change and global fish performance.

6. To suggest the strategies for alleviating the impacts of climate change on agricultural practices in Nigeria.

1.4 RESEARCH QUESTIONS

1. What is the nature of climate change?

2. What are fishery performance and its adaptation on climate change?

3. How does climate change affect fish production?

4. What are the problems fish farmers faces due to effects of climate change?

5. What is the relationship between climate change and global fish performance?

6. What are the strategies for alleviating the impacts of climate change on agricultural practices in Nigeria?

1.5 RESEARCH HYPOTHESES

H01: There is no effect of climate change on fish performance.

H02: There is no significant relationship between climate change and global fish performance.

1.6 SIGNIFICANCE OF THE STUDY

The findings of this study will be beneficial to government, agricultural extension workers, farmers and other researchers. The study will provide information on the perceived extent to which climate change has impacted on fishery performance. The information will help government to encourage and support farmers in fish production activities. The knowledge of the findings would help the government to make policies on how to check climate change and fish production in Rivers state and Nigeria in general. The study will provide information to fish farmers on adaptation strategies, which they could adapt to in such situations. One of the purposes of the study is to discover the suitable strategies for alleviating the impact of climate. The findings of the study would help the fish farmers to reduce the impact of climate change on fish performance. The study will suggest to the fish farmers suitable adaptation options in coping with climate change effects on fish farming. An understanding of the impacts of climate change would help the framers to mount appropriate strategies to keep fish farming profitable to matching the varying trend in its activities. The study could be used as a resource material on climate change and fish performance for researchers who may be interested in researching on related topics. The research is equipped with the findings of climate change and fish performance in Rivers state.

1.7    SCOPE OF THE STUDY 

The study is based on the effect of climate change and global fish performance in Rivers state.

1.8 LIMITATION OF STUDY

Financial constraint- Insufficient fund tends to impede the efficiency of the researcher in sourcing for the relevant materials, literature or information and in the process of data collection (internet, questionnaire and interview).

Time constraint- The researcher will simultaneously engage in this study with other academic work. This consequently will cut down on the time devoted for the research work.

1.8 DEFINITION OF TERMS

Climate Change: The Intergovernmental Panel on Climate Change (IPCC) defines climate change as a change in the state of the climate that can be identified by changes in the mean and / or the variability of its properties and that persists for an extended period, typically decades or longer.

Global:  Farming is the act or process of working the ground, planting seeds, and growing edible plants.

Performance: A method, procedure, process, or rule used in a particular field or profession; a set of these regarded as standard.

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